diff --git a/layout/html/forms/src/nsFormFrame.cpp b/layout/html/forms/src/nsFormFrame.cpp
index 6e9cd710fca5..a128f645cee9 100644
--- a/layout/html/forms/src/nsFormFrame.cpp
+++ b/layout/html/forms/src/nsFormFrame.cpp
@@ -1938,7 +1938,7 @@ nsFormFrame::GetFirstSubmitButtonAndTxtCnt(PRInt32& aInputTxtCnt)
     nsIFormControlFrame* fcFrame = (nsIFormControlFrame*) mFormControls.ElementAt(i);
     PRInt32 type;
     fcFrame->GetType(&type);
-    if ((type == NS_FORM_INPUT_SUBMIT || type == NS_FORM_BUTTON_SUBMIT || type == NS_FORM_BUTTON_IMAGE) && 
+    if ((type == NS_FORM_INPUT_SUBMIT || type == NS_FORM_BUTTON_SUBMIT || type == NS_FORM_INPUT_IMAGE) && 
         submitFrame == nsnull) {
       NS_ASSERTION(fcFrame->QueryInterface(NS_GET_IID(nsIFrame), (void**)&submitFrame) == NS_OK,
                    "This has to be a frame!");