diff --git a/idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/JetChangeInfo.kt b/idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/JetChangeInfo.kt
index b5134ebbf9f..5dd464a67cb 100644
--- a/idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/JetChangeInfo.kt
+++ b/idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/JetChangeInfo.kt
@@ -145,7 +145,7 @@ public class JetChangeInfo(
             buffer.append(JetTokens.FUN_KEYWORD).append(' ').append(name)
         }
 
-        buffer.append(getNewParametersSignature(inheritedFunction, buffer.length()))
+        buffer.append(getNewParametersSignature(inheritedFunction))
 
         if (newReturnType != null && !KotlinBuiltIns.isUnit(newReturnType) && !isConstructor)
             buffer.append(": ").append(newReturnTypeText)
@@ -158,16 +158,15 @@ public class JetChangeInfo(
                && getMethod() == DescriptorToSourceUtils.descriptorToDeclaration(inheritedFunctionDescriptor)
     }
 
-    public fun getNewParametersSignature(inheritedFunction: JetFunctionDefinitionUsage<PsiElement>, indentLength: Int): String {
+    public fun getNewParametersSignature(inheritedFunction: JetFunctionDefinitionUsage<PsiElement>): String {
         val isLambda = inheritedFunction.getDeclaration() is JetFunctionLiteral
         if (isLambda && newParameters.size() == 1 && !newParameters.get(0).requiresExplicitType(inheritedFunction)) {
             return newParameters.get(0).getDeclarationSignature(0, inheritedFunction)
         }
 
-        val indent = StringUtil.repeatSymbol(' ', indentLength + 1)
         return newParameters.indices
                 .map { i -> newParameters[i].getDeclarationSignature(i, inheritedFunction) }
-                .joinToString(prefix = "(", separator = ",$indent", postfix = ")")
+                .joinToString(prefix = "(", separator = ", ", postfix = ")")
     }
 
     public fun renderReturnType(inheritedFunction: JetFunctionDefinitionUsage<PsiElement>): String {
diff --git a/idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/usages/JetFunctionDefinitionUsage.java b/idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/usages/JetFunctionDefinitionUsage.java
index f6e6abdd14b..7c1c778ef20 100644
--- a/idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/usages/JetFunctionDefinitionUsage.java
+++ b/idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/usages/JetFunctionDefinitionUsage.java
@@ -239,14 +239,14 @@ public class JetFunctionDefinitionUsage<T extends PsiElement> extends JetUsageIn
             }
             else {
                 newParameterList = psiFactory.createFunctionLiteralParameterList(changeInfo.getNewParametersSignature(
-                        (JetFunctionDefinitionUsage<PsiElement>) this, 0)
+                        (JetFunctionDefinitionUsage<PsiElement>) this)
                 );
                 canReplaceEntireList = true;
             }
         }
         else {
             newParameterList = psiFactory.createParameterList(changeInfo.getNewParametersSignature(
-                    (JetFunctionDefinitionUsage<PsiElement>) this, 0)
+                    (JetFunctionDefinitionUsage<PsiElement>) this)
             );
         }