diff --git a/content/base/src/nsDocument.cpp b/content/base/src/nsDocument.cpp
index f8dc9fcb4b56..0336acde26c5 100644
--- a/content/base/src/nsDocument.cpp
+++ b/content/base/src/nsDocument.cpp
@@ -443,7 +443,6 @@ nsDOMImplementation::CreateDocument(const nsAReadableString& aNamespaceURI,
 {  
   NS_ENSURE_ARG_POINTER(aReturn);    
   
-  nsresult rv = NS_OK;
   *aReturn = nsnull;
 
   return NS_NewDOMDocument(aReturn, aNamespaceURI, aQualifiedName, aDoctype,
diff --git a/layout/base/src/nsDocument.cpp b/layout/base/src/nsDocument.cpp
index f8dc9fcb4b56..0336acde26c5 100644
--- a/layout/base/src/nsDocument.cpp
+++ b/layout/base/src/nsDocument.cpp
@@ -443,7 +443,6 @@ nsDOMImplementation::CreateDocument(const nsAReadableString& aNamespaceURI,
 {  
   NS_ENSURE_ARG_POINTER(aReturn);    
   
-  nsresult rv = NS_OK;
   *aReturn = nsnull;
 
   return NS_NewDOMDocument(aReturn, aNamespaceURI, aQualifiedName, aDoctype,