diff --git a/js/js.translator/src/org/jetbrains/k2js/config/Config.java b/js/js.translator/src/org/jetbrains/k2js/config/Config.java
index 049ee62f297..8647b610972 100644
--- a/js/js.translator/src/org/jetbrains/k2js/config/Config.java
+++ b/js/js.translator/src/org/jetbrains/k2js/config/Config.java
@@ -121,11 +121,11 @@ public abstract class Config {
             "/kotlin/Maps.kt",
             "/kotlin/Exceptions.kt",
             "/kotlin/IterablesSpecial.kt",
-            "/generated/Arrays.kt",
-            "/generated/Collections.kt",
-            "/generated/Iterables.kt",
-            "/generated/Iterators.kt",
-            "/generated/IteratorsCommon.kt",
+            "/generated/_Arrays.kt",
+            "/generated/_Collections.kt",
+            "/generated/_Iterables.kt",
+            "/generated/_Iterators.kt",
+            "/generated/_IteratorsCommon.kt",
             "/kotlin/support/AbstractIterator.kt",
             "/kotlin/Standard.kt",
             "/kotlin/Strings.kt",
diff --git a/libraries/stdlib/src/generated/Arrays.kt b/libraries/stdlib/src/generated/_Arrays.kt
similarity index 100%
rename from libraries/stdlib/src/generated/Arrays.kt
rename to libraries/stdlib/src/generated/_Arrays.kt
diff --git a/libraries/stdlib/src/generated/BooleanArrays.kt b/libraries/stdlib/src/generated/_BooleanArrays.kt
similarity index 100%
rename from libraries/stdlib/src/generated/BooleanArrays.kt
rename to libraries/stdlib/src/generated/_BooleanArrays.kt
diff --git a/libraries/stdlib/src/generated/ByteArrays.kt b/libraries/stdlib/src/generated/_ByteArrays.kt
similarity index 100%
rename from libraries/stdlib/src/generated/ByteArrays.kt
rename to libraries/stdlib/src/generated/_ByteArrays.kt
diff --git a/libraries/stdlib/src/generated/CharArrays.kt b/libraries/stdlib/src/generated/_CharArrays.kt
similarity index 100%
rename from libraries/stdlib/src/generated/CharArrays.kt
rename to libraries/stdlib/src/generated/_CharArrays.kt
diff --git a/libraries/stdlib/src/generated/Collections.kt b/libraries/stdlib/src/generated/_Collections.kt
similarity index 100%
rename from libraries/stdlib/src/generated/Collections.kt
rename to libraries/stdlib/src/generated/_Collections.kt
diff --git a/libraries/stdlib/src/generated/DoubleArrays.kt b/libraries/stdlib/src/generated/_DoubleArrays.kt
similarity index 100%
rename from libraries/stdlib/src/generated/DoubleArrays.kt
rename to libraries/stdlib/src/generated/_DoubleArrays.kt
diff --git a/libraries/stdlib/src/generated/DownTo.kt b/libraries/stdlib/src/generated/_DownTo.kt
similarity index 100%
rename from libraries/stdlib/src/generated/DownTo.kt
rename to libraries/stdlib/src/generated/_DownTo.kt
diff --git a/libraries/stdlib/src/generated/FloatArrays.kt b/libraries/stdlib/src/generated/_FloatArrays.kt
similarity index 100%
rename from libraries/stdlib/src/generated/FloatArrays.kt
rename to libraries/stdlib/src/generated/_FloatArrays.kt
diff --git a/libraries/stdlib/src/generated/IntArrays.kt b/libraries/stdlib/src/generated/_IntArrays.kt
similarity index 100%
rename from libraries/stdlib/src/generated/IntArrays.kt
rename to libraries/stdlib/src/generated/_IntArrays.kt
diff --git a/libraries/stdlib/src/generated/Iterables.kt b/libraries/stdlib/src/generated/_Iterables.kt
similarity index 100%
rename from libraries/stdlib/src/generated/Iterables.kt
rename to libraries/stdlib/src/generated/_Iterables.kt
diff --git a/libraries/stdlib/src/generated/Iterators.kt b/libraries/stdlib/src/generated/_Iterators.kt
similarity index 100%
rename from libraries/stdlib/src/generated/Iterators.kt
rename to libraries/stdlib/src/generated/_Iterators.kt
diff --git a/libraries/stdlib/src/generated/IteratorsCommon.kt b/libraries/stdlib/src/generated/_IteratorsCommon.kt
similarity index 100%
rename from libraries/stdlib/src/generated/IteratorsCommon.kt
rename to libraries/stdlib/src/generated/_IteratorsCommon.kt
diff --git a/libraries/stdlib/src/generated/LongArrays.kt b/libraries/stdlib/src/generated/_LongArrays.kt
similarity index 100%
rename from libraries/stdlib/src/generated/LongArrays.kt
rename to libraries/stdlib/src/generated/_LongArrays.kt
diff --git a/libraries/stdlib/src/generated/ShortArrays.kt b/libraries/stdlib/src/generated/_ShortArrays.kt
similarity index 100%
rename from libraries/stdlib/src/generated/ShortArrays.kt
rename to libraries/stdlib/src/generated/_ShortArrays.kt
diff --git a/libraries/tools/kotlin-stdlib-gen/src/generators/GenerateStandardLib.kt b/libraries/tools/kotlin-stdlib-gen/src/generators/GenerateStandardLib.kt
index abc234b1b81..f3ac25b5a8d 100644
--- a/libraries/tools/kotlin-stdlib-gen/src/generators/GenerateStandardLib.kt
+++ b/libraries/tools/kotlin-stdlib-gen/src/generators/GenerateStandardLib.kt
@@ -84,29 +84,29 @@ fun main(args: Array<String>) {
     templates.clear()
 
     collections()
-    templates.writeTo(File(outDir, "Arrays.kt")) {
+    templates.writeTo(File(outDir, "_Arrays.kt")) {
         buildFor(Arrays, "")
     }
 
     for (a in otherArrayNames) {
-        templates.writeTo(File(outDir, "${a}Arrays.kt")) {
+        templates.writeTo(File(outDir, "_${a}Arrays.kt")) {
             buildFor(PrimitiveArrays, a)
         }
     }
 
-    templates.writeTo(File(outDir, "Iterables.kt")) {
+    templates.writeTo(File(outDir, "_Iterables.kt")) {
         if (iteratorSignatures contains signature.flat()) "" else buildFor(Iterables, "")
     }
 
-    templates.writeTo(File(outDir, "IteratorsCommon.kt")) {
+    templates.writeTo(File(outDir, "_IteratorsCommon.kt")) {
         if (iteratorSignatures contains signature.flat()) "" else buildFor(Iterators, "")
     }
 
-    templates.writeTo(File(outDir, "Collections.kt")) {
+    templates.writeTo(File(outDir, "_Collections.kt")) {
         if (iteratorSignatures contains signature.flat()) buildFor(Collections, "") else ""
     }
 
-    generateDownTos(File(outDir, "DownTo.kt"), "package kotlin")
+    generateDownTos(File(outDir, "_DownTo.kt"), "package kotlin")
 }
 
 fun String.flat() = this.replaceAll(" ", "")