diff --git a/source/blender/windowmanager/intern/wm_event_system.c b/source/blender/windowmanager/intern/wm_event_system.c
index 074151c9abe..33e98007fed 100644
--- a/source/blender/windowmanager/intern/wm_event_system.c
+++ b/source/blender/windowmanager/intern/wm_event_system.c
@@ -33,7 +33,6 @@
 
 #include <stdlib.h>
 #include <string.h>
-#include <math.h>
 
 #include "DNA_listBase.h"
 #include "DNA_screen_types.h"
@@ -47,6 +46,7 @@
 
 #include "BLI_blenlib.h"
 #include "BLI_utildefines.h"
+#include "BLI_math.h"
 
 #include "BKE_blender.h"
 #include "BKE_context.h"