diff --git a/java/java-impl/src/com/intellij/refactoring/util/duplicates/DuplicatesImpl.java b/java/java-impl/src/com/intellij/refactoring/util/duplicates/DuplicatesImpl.java
index 01bff8bff1b3..3b08eef16b75 100644
--- a/java/java-impl/src/com/intellij/refactoring/util/duplicates/DuplicatesImpl.java
+++ b/java/java-impl/src/com/intellij/refactoring/util/duplicates/DuplicatesImpl.java
@@ -121,7 +121,7 @@ public class DuplicatesImpl {
             @Override
             protected String getMessage() {
               final String message = super.getMessage();
-              return prompt != null ? message + prompt : message;
+              return prompt != null ? message + " " + prompt : message;
             }
           };
           promptDialog.show();