diff --git a/js/js.libraries/src/core/generated/_ArraysJs.kt b/js/js.libraries/src/core/generated/_ArraysJs.kt
index 2d958e33b13..c7ef88525c7 100644
--- a/js/js.libraries/src/core/generated/_ArraysJs.kt
+++ b/js/js.libraries/src/core/generated/_ArraysJs.kt
@@ -12595,7 +12595,7 @@ public fun Array<out Byte>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12609,7 +12609,7 @@ public fun Array<out Short>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12623,7 +12623,7 @@ public fun Array<out Int>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12637,7 +12637,7 @@ public fun Array<out Long>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12651,7 +12651,7 @@ public fun Array<out Float>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12665,7 +12665,7 @@ public fun Array<out Double>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12678,7 +12678,7 @@ public fun ByteArray.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12691,7 +12691,7 @@ public fun ShortArray.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12704,7 +12704,7 @@ public fun IntArray.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12717,7 +12717,7 @@ public fun LongArray.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12730,7 +12730,7 @@ public fun FloatArray.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12743,7 +12743,7 @@ public fun DoubleArray.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
diff --git a/js/js.libraries/src/core/generated/_CollectionsJs.kt b/js/js.libraries/src/core/generated/_CollectionsJs.kt
index 749e33a2f6d..3831d9bc262 100644
--- a/js/js.libraries/src/core/generated/_CollectionsJs.kt
+++ b/js/js.libraries/src/core/generated/_CollectionsJs.kt
@@ -2044,7 +2044,7 @@ public fun Iterable<Byte>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -2058,7 +2058,7 @@ public fun Iterable<Short>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -2072,7 +2072,7 @@ public fun Iterable<Int>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -2086,7 +2086,7 @@ public fun Iterable<Long>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -2100,7 +2100,7 @@ public fun Iterable<Float>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -2114,7 +2114,7 @@ public fun Iterable<Double>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
diff --git a/js/js.libraries/src/core/generated/_SequencesJs.kt b/js/js.libraries/src/core/generated/_SequencesJs.kt
index a12582d9bf6..5b987803920 100644
--- a/js/js.libraries/src/core/generated/_SequencesJs.kt
+++ b/js/js.libraries/src/core/generated/_SequencesJs.kt
@@ -1315,7 +1315,7 @@ public fun Sequence<Byte>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -1329,7 +1329,7 @@ public fun Sequence<Short>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -1343,7 +1343,7 @@ public fun Sequence<Int>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -1357,7 +1357,7 @@ public fun Sequence<Long>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -1371,7 +1371,7 @@ public fun Sequence<Float>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -1385,7 +1385,7 @@ public fun Sequence<Double>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
diff --git a/libraries/stdlib/src/generated/_Arrays.kt b/libraries/stdlib/src/generated/_Arrays.kt
index 778477a7c6d..970ddeb1666 100644
--- a/libraries/stdlib/src/generated/_Arrays.kt
+++ b/libraries/stdlib/src/generated/_Arrays.kt
@@ -12678,7 +12678,7 @@ public fun Array<out Byte>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12692,7 +12692,7 @@ public fun Array<out Short>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12706,7 +12706,7 @@ public fun Array<out Int>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12720,7 +12720,7 @@ public fun Array<out Long>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12734,7 +12734,7 @@ public fun Array<out Float>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12748,7 +12748,7 @@ public fun Array<out Double>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12761,7 +12761,7 @@ public fun ByteArray.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12774,7 +12774,7 @@ public fun ShortArray.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12787,7 +12787,7 @@ public fun IntArray.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12800,7 +12800,7 @@ public fun LongArray.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12813,7 +12813,7 @@ public fun FloatArray.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -12826,7 +12826,7 @@ public fun DoubleArray.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
diff --git a/libraries/stdlib/src/generated/_Collections.kt b/libraries/stdlib/src/generated/_Collections.kt
index 8b06161a548..cd5e9f200a6 100644
--- a/libraries/stdlib/src/generated/_Collections.kt
+++ b/libraries/stdlib/src/generated/_Collections.kt
@@ -2055,7 +2055,7 @@ public fun Iterable<Byte>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -2069,7 +2069,7 @@ public fun Iterable<Short>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -2083,7 +2083,7 @@ public fun Iterable<Int>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -2097,7 +2097,7 @@ public fun Iterable<Long>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -2111,7 +2111,7 @@ public fun Iterable<Float>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -2125,7 +2125,7 @@ public fun Iterable<Double>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
diff --git a/libraries/stdlib/src/generated/_Sequences.kt b/libraries/stdlib/src/generated/_Sequences.kt
index c8d17c9211d..002cf109359 100644
--- a/libraries/stdlib/src/generated/_Sequences.kt
+++ b/libraries/stdlib/src/generated/_Sequences.kt
@@ -1334,7 +1334,7 @@ public fun Sequence<Byte>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -1348,7 +1348,7 @@ public fun Sequence<Short>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -1362,7 +1362,7 @@ public fun Sequence<Int>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -1376,7 +1376,7 @@ public fun Sequence<Long>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -1390,7 +1390,7 @@ public fun Sequence<Float>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
@@ -1404,7 +1404,7 @@ public fun Sequence<Double>.average(): Double {
         sum += element
         count += 1
     }
-    return if (count == 0) 0.0 else sum / count
+    return if (count == 0) Double.NaN else sum / count
 }
 
 /**
diff --git a/libraries/stdlib/test/collections/ArraysTest.kt b/libraries/stdlib/test/collections/ArraysTest.kt
index 7df2e894ecf..e18c1b48723 100644
--- a/libraries/stdlib/test/collections/ArraysTest.kt
+++ b/libraries/stdlib/test/collections/ArraysTest.kt
@@ -420,7 +420,7 @@ class ArraysTest {
     }
 
     @Test fun average() {
-        expect(0.0) { arrayOf<Int>().average() }
+        assertTrue() { arrayOf<Int>().average().isNaN() }
         expect(3.8) { arrayOf(1, 2, 5, 8, 3).average() }
         expect(2.1) { arrayOf(1.6, 2.6, 3.6, 0.6).average() }
         expect(100.0) { arrayOf<Byte>(100, 100, 100, 100, 100, 100).average() }
diff --git a/libraries/stdlib/test/collections/CollectionTest.kt b/libraries/stdlib/test/collections/CollectionTest.kt
index c3df8309e5d..040f49c7e24 100644
--- a/libraries/stdlib/test/collections/CollectionTest.kt
+++ b/libraries/stdlib/test/collections/CollectionTest.kt
@@ -741,7 +741,7 @@ class CollectionTest {
     }
 
     @Test fun average() {
-        expect(0.0) { arrayListOf<Int>().average() }
+        assertTrue { arrayListOf<Int>().average().isNaN() }
         expect(3.8) { listOf(1, 2, 5, 8, 3).average() }
         expect(2.1) { sequenceOf(1.6, 2.6, 3.6, 0.6).average() }
         expect(100.0) { arrayListOf<Byte>(100, 100, 100, 100, 100, 100).average() }
diff --git a/libraries/tools/kotlin-stdlib-gen/src/templates/Numeric.kt b/libraries/tools/kotlin-stdlib-gen/src/templates/Numeric.kt
index 8a2bdb1c1f4..9cc18682b41 100644
--- a/libraries/tools/kotlin-stdlib-gen/src/templates/Numeric.kt
+++ b/libraries/tools/kotlin-stdlib-gen/src/templates/Numeric.kt
@@ -36,7 +36,7 @@ fun numeric(): List<GenericFunction> {
                 sum += element
                 count += 1
             }
-            return if (count == 0) 0.0 else sum / count
+            return if (count == 0) Double.NaN else sum / count
             """
         }
     }