diff --git a/mozilla/layout/forms/nsISelectControlFrame.h b/mozilla/layout/forms/nsISelectControlFrame.h
index 86c77c4c900..6badb948960 100644
--- a/mozilla/layout/forms/nsISelectControlFrame.h
+++ b/mozilla/layout/forms/nsISelectControlFrame.h
@@ -64,7 +64,7 @@ public:
   /**
    * Sets the select state of the option at index
    */
-  NS_IMETHOD DoneAddingContent() = 0;
+  NS_IMETHOD DoneAddingContent(PRBool aIsDone) = 0;
 
 };
 
diff --git a/mozilla/layout/html/forms/public/nsISelectControlFrame.h b/mozilla/layout/html/forms/public/nsISelectControlFrame.h
index 86c77c4c900..6badb948960 100644
--- a/mozilla/layout/html/forms/public/nsISelectControlFrame.h
+++ b/mozilla/layout/html/forms/public/nsISelectControlFrame.h
@@ -64,7 +64,7 @@ public:
   /**
    * Sets the select state of the option at index
    */
-  NS_IMETHOD DoneAddingContent() = 0;
+  NS_IMETHOD DoneAddingContent(PRBool aIsDone) = 0;
 
 };