diff --git a/updater/src/com/intellij/updater/BaseUpdateAction.java b/updater/src/com/intellij/updater/BaseUpdateAction.java
index 846a2f8dd934..58f8c8e811a9 100644
--- a/updater/src/com/intellij/updater/BaseUpdateAction.java
+++ b/updater/src/com/intellij/updater/BaseUpdateAction.java
@@ -120,13 +120,6 @@ public abstract class BaseUpdateAction extends PatchAction {
     }
   }
 
-  protected void writeDiff(File olderFile, File newerFile, OutputStream patchOutput) throws IOException {
-    try (BufferedInputStream olderFileIn = new BufferedInputStream(Utils.newFileInputStream(olderFile, myPatch.isNormalized()));
-         BufferedInputStream newerFileIn = new BufferedInputStream(new FileInputStream(newerFile))) {
-      writeDiff(olderFileIn, newerFileIn, patchOutput);
-    }
-  }
-
   protected void writeDiff(InputStream olderFileIn, InputStream newerFileIn, OutputStream patchOutput) throws IOException {
     Runner.logger().info("writing diff");
     ByteArrayOutputStream diffOutput = new OpenByteArrayOutputStream();
diff --git a/updater/src/com/intellij/updater/UpdateAction.java b/updater/src/com/intellij/updater/UpdateAction.java
index 02905b4ada1f..b7770109e323 100644
--- a/updater/src/com/intellij/updater/UpdateAction.java
+++ b/updater/src/com/intellij/updater/UpdateAction.java
@@ -27,7 +27,10 @@ public class UpdateAction extends BaseUpdateAction {
       FileType type = getFileType(newerFile);
       if (type == FileType.SYMLINK) throw new IOException("Unexpected symlink: " + newerFile);
       writeFileType(patchOutput, type);
-      writeDiff(olderFile, newerFile, patchOutput);
+      try (BufferedInputStream olderFileIn = new BufferedInputStream(Utils.newFileInputStream(olderFile, myPatch.isNormalized()));
+           BufferedInputStream newerFileIn = new BufferedInputStream(new FileInputStream(newerFile))) {
+        writeDiff(olderFileIn, newerFileIn, patchOutput);
+      }
 
       patchOutput.closeEntry();
     }