diff --git a/libgo/runtime/mgc0.c b/libgo/runtime/mgc0.c
index 4b78f3bda56..2d6328fbac3 100644
--- a/libgo/runtime/mgc0.c
+++ b/libgo/runtime/mgc0.c
@@ -2204,6 +2204,7 @@ runtime_gc(int32 force)
 		g->status = Gwaiting;
 		g->waitreason = "garbage collection";
 		runtime_mcall(mgc);
+		m = runtime_m();
 	}
 
 	// all done