diff --git a/mozilla/netwerk/cache/src/nsDiskCacheStreams.cpp b/mozilla/netwerk/cache/src/nsDiskCacheStreams.cpp
index 4c536116a5c..da05d72fe67 100644
--- a/mozilla/netwerk/cache/src/nsDiskCacheStreams.cpp
+++ b/mozilla/netwerk/cache/src/nsDiskCacheStreams.cpp
@@ -211,7 +211,7 @@ nsDiskCacheOutputStream::nsDiskCacheOutputStream( nsDiskCacheStreamIO * parent)
 nsDiskCacheOutputStream::~nsDiskCacheOutputStream()
 {
     Close();
-    NS_ASSERTION(!mStreamIO, "leak");
+    ReleaseStreamIO();
 }