diff --git a/sc2/src/sc2code/units.h b/sc2/src/sc2code/units.h
index 4b9dd7c05..a093ee3ee 100644
--- a/sc2/src/sc2code/units.h
+++ b/sc2/src/sc2code/units.h
@@ -25,7 +25,7 @@
 #define NUM_VIEWS (MAX_VIS_REDUCTION + 1)
 
 #define ZOOM_SHIFT 8
-#define MAX_ZOOM_OUT (1 << ZOOM_SHIFT + MAX_REDUCTION - 1)
+#define MAX_ZOOM_OUT (1 << (ZOOM_SHIFT + MAX_REDUCTION - 1))
 
 #define ONE_SHIFT 2
 #define BACKGROUND_SHIFT 3