diff --git a/stepmania/src/RageThreads.cpp b/stepmania/src/RageThreads.cpp
index 619f27511a..c2865fba10 100644
--- a/stepmania/src/RageThreads.cpp
+++ b/stepmania/src/RageThreads.cpp
@@ -253,6 +253,7 @@ int RageThread::Wait()
 
 	int ret;
 	SDL_WaitThread(thr, &ret);
+	thr = NULL;
 	return ret;
 }