diff --git a/mozilla/content/html/content/src/nsHTMLInputElement.cpp b/mozilla/content/html/content/src/nsHTMLInputElement.cpp
index 14e1944dbc2..fa5f03bf67c 100644
--- a/mozilla/content/html/content/src/nsHTMLInputElement.cpp
+++ b/mozilla/content/html/content/src/nsHTMLInputElement.cpp
@@ -2096,6 +2096,12 @@ nsHTMLInputElement::GetAttributeChangeHint(const nsIAtom* aAttribute,
     nsGenericHTMLFormElement::GetAttributeChangeHint(aAttribute, aModType);
   if (aAttribute == nsGkAtoms::type) {
     NS_UpdateHint(retval, NS_STYLE_HINT_FRAMECHANGE);
+  } else if (mType == NS_FORM_INPUT_IMAGE &&
+             (aAttribute == nsGkAtoms::alt ||
+              aAttribute == nsGkAtoms::value)) {
+    // We might need to rebuild our alt text.  Just go ahead and
+    // reconstruct our frame.  This should be quite rare..
+    NS_UpdateHint(retval, NS_STYLE_HINT_FRAMECHANGE);
   } else if (aAttribute == nsGkAtoms::value) {
     NS_UpdateHint(retval, NS_STYLE_HINT_REFLOW);
   } else if (aAttribute == nsGkAtoms::size &&