diff --git a/mozilla/layout/forms/nsIsIndexFrame.cpp b/mozilla/layout/forms/nsIsIndexFrame.cpp
index 3c597b09620..b6d5bfd2efa 100644
--- a/mozilla/layout/forms/nsIsIndexFrame.cpp
+++ b/mozilla/layout/forms/nsIsIndexFrame.cpp
@@ -120,9 +120,10 @@ nsIsIndexFrame::Paint(nsIPresContext* aPresContext,
 NS_IMETHODIMP
 nsIsIndexFrame::UpdatePromptLabel()
 {
-  nsresult result;
   if (!mTextContent) return NS_ERROR_UNEXPECTED;
 
+  nsresult result = NS_OK;
+
   // Get the text from the "prompt" attribute.
   // If it is zero length, set it to a default value (localized)
   nsAutoString prompt;
@@ -370,11 +371,12 @@ nsIsIndexFrame::GetFrameName(nsString& aResult) const
 NS_IMETHODIMP
 nsIsIndexFrame::OnSubmit(nsIPresContext* aPresContext)
 {
-  nsresult result;
   if (!mContent || !mInputContent) {
     return NS_ERROR_UNEXPECTED;
   }
 
+  nsresult result = NS_OK;
+
   // Begin ProcessAsURLEncoded
   nsAutoString data;
 
diff --git a/mozilla/layout/html/forms/src/nsIsIndexFrame.cpp b/mozilla/layout/html/forms/src/nsIsIndexFrame.cpp
index 3c597b09620..b6d5bfd2efa 100644
--- a/mozilla/layout/html/forms/src/nsIsIndexFrame.cpp
+++ b/mozilla/layout/html/forms/src/nsIsIndexFrame.cpp
@@ -120,9 +120,10 @@ nsIsIndexFrame::Paint(nsIPresContext* aPresContext,
 NS_IMETHODIMP
 nsIsIndexFrame::UpdatePromptLabel()
 {
-  nsresult result;
   if (!mTextContent) return NS_ERROR_UNEXPECTED;
 
+  nsresult result = NS_OK;
+
   // Get the text from the "prompt" attribute.
   // If it is zero length, set it to a default value (localized)
   nsAutoString prompt;
@@ -370,11 +371,12 @@ nsIsIndexFrame::GetFrameName(nsString& aResult) const
 NS_IMETHODIMP
 nsIsIndexFrame::OnSubmit(nsIPresContext* aPresContext)
 {
-  nsresult result;
   if (!mContent || !mInputContent) {
     return NS_ERROR_UNEXPECTED;
   }
 
+  nsresult result = NS_OK;
+
   // Begin ProcessAsURLEncoded
   nsAutoString data;