diff --git a/netwerk/base/src/nsStreamListenerProxy.cpp b/netwerk/base/src/nsStreamListenerProxy.cpp
index 7feb0497376..e7fa43a1f2b 100644
--- a/netwerk/base/src/nsStreamListenerProxy.cpp
+++ b/netwerk/base/src/nsStreamListenerProxy.cpp
@@ -75,7 +75,8 @@ static PRLogModuleInfo *gStreamListenerProxyLog;
 //----------------------------------------------------------------------------
 
 nsStreamListenerProxy::nsStreamListenerProxy()
-    : mLock(nsnull)
+    : mObserverProxy(nsnull)
+    , mLock(nsnull)
     , mPendingCount(0)
     , mPipeEmptied(PR_FALSE)
     , mListenerStatus(NS_OK)