diff --git a/ChangeLog.md b/ChangeLog.md
index 4e6f3b2fcb1..39fc724ab00 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -3,6 +3,13 @@
 <!-- Find: ([^\`/\[])(KT-\d+) -->
 <!-- Replace: $1[`$2`](https://youtrack.jetbrains.com/issue/$2) -->
 
+## 1.1-M03 (EAP-3)
+
+### Compiler
+
+#### Coroutines related issues
+- Make fields for storing lambda parameters non-final (as they get assigned within `invoke` call)
+
 ## 1.1-M02 (EAP-2)
 
 ### Language features
diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/CoroutineCodegen.kt b/compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/CoroutineCodegen.kt
index 742b018f5ff..0acd0c7d2c5 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/CoroutineCodegen.kt
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/CoroutineCodegen.kt
@@ -59,7 +59,7 @@ class CoroutineCodegen(
         for (parameter in funDescriptor.valueParameters) {
             v.newField(
                     OtherOrigin(parameter),
-                    Opcodes.ACC_PRIVATE or Opcodes.ACC_FINAL,
+                    Opcodes.ACC_PRIVATE,
                     COROUTINE_LAMBDA_PARAMETER_PREFIX + parameter.index,
                     typeMapper.mapType(parameter.type).descriptor, null, null)
         }
diff --git a/compiler/testData/codegen/bytecodeListing/coroutineFields.txt b/compiler/testData/codegen/bytecodeListing/coroutineFields.txt
index a51e1efbb2c..959727121c8 100644
--- a/compiler/testData/codegen/bytecodeListing/coroutineFields.txt
+++ b/compiler/testData/codegen/bytecodeListing/coroutineFields.txt
@@ -10,8 +10,8 @@ final class CoroutineFieldsKt$box$1 {
     private field J$0: long
     private field L$0: java.lang.Object
     private field L$1: java.lang.Object
-    private final field p$0: java.lang.String
-    private final field p$1: long
+    private field p$0: java.lang.String
+    private field p$1: long
     inner class CoroutineFieldsKt$box$1
     method <init>(p0: kotlin.jvm.internal.Ref$ObjectRef): void
     protected final method doResume(@org.jetbrains.annotations.Nullable p0: java.lang.Object, @org.jetbrains.annotations.Nullable p1: java.lang.Throwable): void