diff --git a/source/games/duke/src/player_r.cpp b/source/games/duke/src/player_r.cpp
index 378488dc4..cc22cf2e3 100644
--- a/source/games/duke/src/player_r.cpp
+++ b/source/games/duke/src/player_r.cpp
@@ -2731,7 +2731,7 @@ static void operateweapon(int snum, ESyncBits actions, int psect)
 			else
 			{
 				k = 140;
-				i = -512 - -MulScale(p->horizon.sum().asq16(), 20, 16);
+				i = -512 - MulScale(p->horizon.sum().asq16(), 20, 16);
 			}
 
 			auto spawned = EGS(p->cursectnum,