diff --git a/xpcom/threads/nsThread.cpp b/xpcom/threads/nsThread.cpp
index 06fae2920a50..46c923d92984 100644
--- a/xpcom/threads/nsThread.cpp
+++ b/xpcom/threads/nsThread.cpp
@@ -145,7 +145,6 @@ nsThread::Exit(void* arg)
     }
 
     self->mDead = PR_TRUE;
-    self->mThread = nsnull;
 
 #if defined(PR_LOGGING)
     if (nsIThreadLog) {