diff --git a/libraries/stdlib/src/generated/_Arrays.kt b/libraries/stdlib/src/generated/_Arrays.kt
index f808ced1395..96cc0240311 100644
--- a/libraries/stdlib/src/generated/_Arrays.kt
+++ b/libraries/stdlib/src/generated/_Arrays.kt
@@ -275,53 +275,53 @@ public fun ShortArray.isNotEmpty(): Boolean {
  * Returns the last valid index for the array
  */
 public val <T> Array<out T>.lastIndex: Int
-    get() = size - 1
+    get() = size() - 1
 
 /**
  * Returns the last valid index for the array
  */
 public val BooleanArray.lastIndex: Int
-    get() = size - 1
+    get() = size() - 1
 
 /**
  * Returns the last valid index for the array
  */
 public val ByteArray.lastIndex: Int
-    get() = size - 1
+    get() = size() - 1
 
 /**
  * Returns the last valid index for the array
  */
 public val CharArray.lastIndex: Int
-    get() = size - 1
+    get() = size() - 1
 
 /**
  * Returns the last valid index for the array
  */
 public val DoubleArray.lastIndex: Int
-    get() = size - 1
+    get() = size() - 1
 
 /**
  * Returns the last valid index for the array
  */
 public val FloatArray.lastIndex: Int
-    get() = size - 1
+    get() = size() - 1
 
 /**
  * Returns the last valid index for the array
  */
 public val IntArray.lastIndex: Int
-    get() = size - 1
+    get() = size() - 1
 
 /**
  * Returns the last valid index for the array
  */
 public val LongArray.lastIndex: Int
-    get() = size - 1
+    get() = size() - 1
 
 /**
  * Returns the last valid index for the array
  */
 public val ShortArray.lastIndex: Int
-    get() = size - 1
+    get() = size() - 1
 
diff --git a/libraries/tools/kotlin-stdlib-gen/src/templates/Arrays.kt b/libraries/tools/kotlin-stdlib-gen/src/templates/Arrays.kt
index 9f833057273..92c8f8784c4 100644
--- a/libraries/tools/kotlin-stdlib-gen/src/templates/Arrays.kt
+++ b/libraries/tools/kotlin-stdlib-gen/src/templates/Arrays.kt
@@ -41,7 +41,7 @@ fun arrays(): List<GenericFunction> {
         doc { "Returns the last valid index for the array" }
         returns("Int")
         body {
-            "get() = size - 1"
+            "get() = size() - 1"
         }
     }