diff --git a/startupcache/StartupCache.cpp b/startupcache/StartupCache.cpp
index fb0c91172560..44b683857f70 100644
--- a/startupcache/StartupCache.cpp
+++ b/startupcache/StartupCache.cpp
@@ -471,8 +471,6 @@ StartupCacheDebugOutputStream::CheckReferences(nsISupports* aObject)
 nsresult
 StartupCacheDebugOutputStream::WriteObject(nsISupports* aObject, PRBool aIsStrongRef)
 {
-  nsresult rv;
-  
   nsCOMPtr<nsISupports> rootObject(do_QueryInterface(aObject));
   
   NS_ASSERTION(rootObject.get() == aObject,
@@ -485,7 +483,6 @@ StartupCacheDebugOutputStream::WriteObject(nsISupports* aObject, PRBool aIsStron
 nsresult
 StartupCacheDebugOutputStream::WriteSingleRefObject(nsISupports* aObject)
 {
-  nsresult rv;
   nsCOMPtr<nsISupports> rootObject(do_QueryInterface(aObject));
   
   NS_ASSERTION(rootObject.get() == aObject,
@@ -500,7 +497,6 @@ StartupCacheDebugOutputStream::WriteCompoundObject(nsISupports* aObject,
                                                 const nsIID& aIID,
                                                 PRBool aIsStrongRef)
 {
-  nsresult rv;
   nsCOMPtr<nsISupports> rootObject(do_QueryInterface(aObject));
   
   nsCOMPtr<nsISupports> roundtrip;