diff --git a/mozilla/layout/forms/nsGfxButtonControlFrame.cpp b/mozilla/layout/forms/nsGfxButtonControlFrame.cpp
index 43a71fa7642..3069626229d 100644
--- a/mozilla/layout/forms/nsGfxButtonControlFrame.cpp
+++ b/mozilla/layout/forms/nsGfxButtonControlFrame.cpp
@@ -40,6 +40,7 @@
 #include "nsWidgetsCID.h"
 #include "nsIFontMetrics.h"
 #include "nsFormControlFrame.h"
+#include "nsIFormControl.h"
 #include "nsISupportsArray.h"
 #include "nsINameSpaceManager.h"
 #ifdef ACCESSIBILITY
diff --git a/mozilla/layout/html/forms/src/nsGfxButtonControlFrame.cpp b/mozilla/layout/html/forms/src/nsGfxButtonControlFrame.cpp
index 43a71fa7642..3069626229d 100644
--- a/mozilla/layout/html/forms/src/nsGfxButtonControlFrame.cpp
+++ b/mozilla/layout/html/forms/src/nsGfxButtonControlFrame.cpp
@@ -40,6 +40,7 @@
 #include "nsWidgetsCID.h"
 #include "nsIFontMetrics.h"
 #include "nsFormControlFrame.h"
+#include "nsIFormControl.h"
 #include "nsISupportsArray.h"
 #include "nsINameSpaceManager.h"
 #ifdef ACCESSIBILITY