diff --git a/libraries/kdoc/src/main/kotlin/org/jetbrains/kotlin/template/TemplateCore.kt b/libraries/kdoc/src/main/kotlin/org/jetbrains/kotlin/template/TemplateCore.kt
index 964152345a4..f581b66a2d5 100644
--- a/libraries/kdoc/src/main/kotlin/org/jetbrains/kotlin/template/TemplateCore.kt
+++ b/libraries/kdoc/src/main/kotlin/org/jetbrains/kotlin/template/TemplateCore.kt
@@ -81,7 +81,7 @@ abstract class TextTemplate() : TemplateSupport(), Printer {
 
     fun renderTo(os: OutputStream): Unit {
         // TODO compiler error
-        //OutputStreamWriter(os).foreach{ renderTo(it) }
+        //OutputStreamWriter(os).forEach{ renderTo(it) }
         val s = OutputStreamWriter(os)
         renderTo(s)
         s.close()
@@ -89,7 +89,7 @@ abstract class TextTemplate() : TemplateSupport(), Printer {
 
     fun renderTo(file: File): Unit {
         // TODO compiler error
-        //FileWriter(file).foreach{ s -> renderTo(s) }
+        //FileWriter(file).forEach{ s -> renderTo(s) }
         val s = FileWriter(file)
         renderTo(s)
         s.close()
diff --git a/libraries/stdlib/src/JavaIo.kt b/libraries/stdlib/src/JavaIo.kt
index abeb9732d46..c847a77bd0f 100644
--- a/libraries/stdlib/src/JavaIo.kt
+++ b/libraries/stdlib/src/JavaIo.kt
@@ -199,7 +199,7 @@ inline fun Reader.buffered(): BufferedReader = if(this is BufferedReader) this e
 
 inline fun Reader.buffered(bufferSize: Int) = BufferedReader(this, bufferSize)
 
-inline fun Reader.foreachLine(block: (String) -> Unit): Unit {
+inline fun Reader.forEachLine(block: (String) -> Unit): Unit {
     this.use{
         val iter = buffered().lineIterator()
         while (iter.hasNext) {
diff --git a/libraries/stdlib/src/JavaIterables.kt b/libraries/stdlib/src/JavaIterables.kt
index 80fb970453d..be59815caa8 100644
--- a/libraries/stdlib/src/JavaIterables.kt
+++ b/libraries/stdlib/src/JavaIterables.kt
@@ -104,7 +104,7 @@ inline fun <T, R> java.lang.Iterable<T>.flatMapTo(result: Collection<R>, transfo
 }
 
 /** Performs the given operation on each element inside the collection */
-inline fun <T> java.lang.Iterable<T>.foreach(operation: (element: T) -> Unit) {
+inline fun <T> java.lang.Iterable<T>.forEach(operation: (element: T) -> Unit) {
   for (elem in this)
     operation(elem)
 }
diff --git a/libraries/stdlib/src/generated/ArraysFromJavaIterables.kt b/libraries/stdlib/src/generated/ArraysFromJavaIterables.kt
index fff72dc1fb7..6cc7a6e91bf 100644
--- a/libraries/stdlib/src/generated/ArraysFromJavaIterables.kt
+++ b/libraries/stdlib/src/generated/ArraysFromJavaIterables.kt
@@ -107,7 +107,7 @@ inline fun <T, R> Array<T>.flatMapTo(result: Collection<R>, transform: (T)-> Col
 }
 
 /** Performs the given operation on each element inside the collection */
-inline fun <T> Array<T>.foreach(operation: (element: T) -> Unit) {
+inline fun <T> Array<T>.forEach(operation: (element: T) -> Unit) {
   for (elem in this)
     operation(elem)
 }
diff --git a/libraries/stdlib/src/generated/StandardFromJavaIterables.kt b/libraries/stdlib/src/generated/StandardFromJavaIterables.kt
index 6f3470b2f73..3714a677c35 100644
--- a/libraries/stdlib/src/generated/StandardFromJavaIterables.kt
+++ b/libraries/stdlib/src/generated/StandardFromJavaIterables.kt
@@ -95,7 +95,7 @@ inline fun <T, R> Iterable<T>.flatMapTo(result: Collection<R>, transform: (T)->
 }
 
 /** Performs the given operation on each element inside the collection */
-inline fun <T> Iterable<T>.foreach(operation: (element: T) -> Unit) {
+inline fun <T> Iterable<T>.forEach(operation: (element: T) -> Unit) {
   for (elem in this)
     operation(elem)
 }
diff --git a/libraries/testlib/test/CollectionApiCheck.kt b/libraries/testlib/test/CollectionApiCheck.kt
index 811508f8908..4e23ead9e21 100644
--- a/libraries/testlib/test/CollectionApiCheck.kt
+++ b/libraries/testlib/test/CollectionApiCheck.kt
@@ -20,7 +20,7 @@ trait Traversable<T> {
   fun filter(predicate: (T)-> Boolean) : Collection<T>
 
   /** Performs the given operation on each element inside the collection */
-  fun foreach(operation: (element: T)-> Unit)
+  fun forEach(operation: (element: T)-> Unit)
 
   /** Returns a new collection containing the results of applying the given function to each element in this collection */
   fun <T, R> java.lang.Iterable<T>.map(transform : (T)-> R) : Collection<R>
diff --git a/libraries/testlib/test/CollectionTest.kt b/libraries/testlib/test/CollectionTest.kt
index bdb6fdf9551..5b8eec239eb 100644
--- a/libraries/testlib/test/CollectionTest.kt
+++ b/libraries/testlib/test/CollectionTest.kt
@@ -125,7 +125,7 @@ class CollectionTest() : TestCase() {
 
     fun testForeach() {
         var count = 0
-        data.foreach{ count += it.length }
+        data.forEach{ count += it.length }
         assertEquals(6, count)
     }
 
diff --git a/libraries/testlib/test/IoTest.kt b/libraries/testlib/test/IoTest.kt
index 27a95b35780..5d46da4571f 100644
--- a/libraries/testlib/test/IoTest.kt
+++ b/libraries/testlib/test/IoTest.kt
@@ -55,17 +55,17 @@ class IoTest() : TestCase() {
     val reader = sample()
 
     /* TODO would be nicer maybe to write this as
-        reader.lines.foreach { ... }
+        reader.lines.forEach { ... }
 
       as we could one day maybe one day write that as
         for (line in reader.lines)
 
       if the for(elem in thing) {...} statement could act as syntax sugar for
-        thing.foreach{ elem -> ... }
+        thing.forEach{ elem -> ... }
 
-      if thing is not an Iterable/array/Iterator but has a suitable foreach method
+      if thing is not an Iterable/array/Iterator but has a suitable forEach method
     */
-    reader.foreachLine{
+    reader.forEachLine{
       list.add(it)
     }
 
diff --git a/libraries/testlib/test/regressions/Kt1149.kt b/libraries/testlib/test/regressions/Kt1149.kt
index 8404e5093f8..d0d2becdcff 100644
--- a/libraries/testlib/test/regressions/Kt1149.kt
+++ b/libraries/testlib/test/regressions/Kt1149.kt
@@ -17,7 +17,7 @@ class Kt1149Test() : TestCase() {
                 res.add("anonymous.foo()")
             }
         })
-        list.foreach{ it.foo() }
+        list.forEach{ it.foo() }
         Assert.assertEquals("anonymous.foo()", res[0])
     }
 }