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-rw-r--r--erts/emulator/beam/erl_thr_progress.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/erts/emulator/beam/erl_thr_progress.h b/erts/emulator/beam/erl_thr_progress.h
index fa936b5707..8c029bcf99 100644
--- a/erts/emulator/beam/erl_thr_progress.h
+++ b/erts/emulator/beam/erl_thr_progress.h
@@ -28,7 +28,7 @@
* Author: Rickard Green
*/
-#if !defined(ERL_THR_PROGRESS_H__TSD_TYPE__)
+#ifndef ERL_THR_PROGRESS_H__TSD_TYPE__
#define ERL_THR_PROGRESS_H__TSD_TYPE__
#include "sys.h"