diff --git a/platform/vcs-api/vcs-api-core/src/com/intellij/openapi/diff/impl/patch/UnifiedDiffWriter.java b/platform/vcs-api/vcs-api-core/src/com/intellij/openapi/diff/impl/patch/UnifiedDiffWriter.java
index 612a22dfd60e..56997f1ea61f 100644
--- a/platform/vcs-api/vcs-api-core/src/com/intellij/openapi/diff/impl/patch/UnifiedDiffWriter.java
+++ b/platform/vcs-api/vcs-api-core/src/com/intellij/openapi/diff/impl/patch/UnifiedDiffWriter.java
@@ -126,7 +126,9 @@ public class UnifiedDiffWriter {
     writer.write(prefix + " ");
     writer.write(revisionPath);
     writer.write("\t");
-    writer.write(revisionName);
+    if (!StringUtil.isEmptyOrSpaces(revisionName)) {
+      writer.write(revisionName);
+    }
     writer.write(lineSeparator);
   }