1 files changed, 1 insertions, 1 deletions

diff --git a/rts/STM.h b/rts/STM.h
index e9e5e27cd9..2484c2f991 100644
--- a/rts/STM.h
+++ b/rts/STM.h
@@ -32,7 +32,7 @@
 
 #pragma once
 
-#ifdef THREADED_RTS
+#if defined(THREADED_RTS)
 //#define STM_CG_LOCK
 #define STM_FG_LOCKS
 #else