diff --git a/platform/diff-impl/src/com/intellij/diff/actions/ShowDiffAction.java b/platform/diff-impl/src/com/intellij/diff/actions/ShowDiffAction.java
index 1d856d071d30..75fe8eb96cab 100644
--- a/platform/diff-impl/src/com/intellij/diff/actions/ShowDiffAction.java
+++ b/platform/diff-impl/src/com/intellij/diff/actions/ShowDiffAction.java
@@ -20,6 +20,9 @@ import com.intellij.openapi.actionSystem.ExtendableAction;
 import com.intellij.openapi.extensions.ExtensionPointName;
 import com.intellij.openapi.project.DumbAware;
 
+/**
+ * Default implementation is in {@link com.intellij.openapi.vcs.changes.actions.diff.ShowDiffAction}.
+ */
 public class ShowDiffAction extends ExtendableAction implements DumbAware {
   private static final ExtensionPointName<AnActionExtensionProvider> EP_NAME =
     ExtensionPointName.create("com.intellij.diff.actions.ShowDiffAction.ExtensionProvider");
diff --git a/platform/vcs-impl/src/com/intellij/openapi/vcs/changes/actions/diff/ShowDiffAction.java b/platform/vcs-impl/src/com/intellij/openapi/vcs/changes/actions/diff/ShowDiffAction.java
index 42b2af4c7fcc..fa1958c62bc5 100644
--- a/platform/vcs-impl/src/com/intellij/openapi/vcs/changes/actions/diff/ShowDiffAction.java
+++ b/platform/vcs-impl/src/com/intellij/openapi/vcs/changes/actions/diff/ShowDiffAction.java
@@ -40,7 +40,7 @@ import java.util.Map;
 public class ShowDiffAction implements AnActionExtensionProvider {
   @Override
   public boolean isActive(@NotNull AnActionEvent e) {
-    return true;
+    return true; // order="last"
   }
 
   @Override