diff --git a/rdf/base/src/nsRDFContentSink.cpp b/rdf/base/src/nsRDFContentSink.cpp
index ea2df5e8c82..f266e09d41d 100644
--- a/rdf/base/src/nsRDFContentSink.cpp
+++ b/rdf/base/src/nsRDFContentSink.cpp
@@ -848,7 +848,7 @@ RDFContentSinkImpl::GetIdAboutAttribute(const PRUnichar** aAttributes,
                                         PRBool* aIsAnonymous)
 {
     // This corresponds to the dirty work of production [6.5]
-    nsresult rv;
+    nsresult rv = NS_OK;
 
     nsAutoString nodeID;