diff --git a/source/exhumed/src/engine.h b/source/exhumed/src/engine.h
index b9e39dc10..4a9aebaa3 100644
--- a/source/exhumed/src/engine.h
+++ b/source/exhumed/src/engine.h
@@ -131,11 +131,6 @@ inline int Sin(int angle)
     return sintable[angle & kAngleMask];
 }
 
-inline double FSin(double angle)
-{
-    return calcSinTableValue(fmod(angle, kAngleMask + 1));
-}
-
 inline int Cos(int angle)
 {
     return sintable[(angle + 512) & kAngleMask];
diff --git a/source/exhumed/src/gun.cpp b/source/exhumed/src/gun.cpp
index db968a28b..995b0af74 100644
--- a/source/exhumed/src/gun.cpp
+++ b/source/exhumed/src/gun.cpp
@@ -967,7 +967,7 @@ void DrawWeapons(double smooth)
 
         if (var_34 == 1)
         {
-            xOffset = ((FSin(nBobAngle + 512) / 256.) * nVal) / 256.;
+            xOffset = fmulscale8(bcosf(nBobAngle, -8), nVal);
         }
     }
     else