diff --git a/source/games/sw/src/jweapon.cpp b/source/games/sw/src/jweapon.cpp
index 0acd15c0b..eed7f4ad6 100644
--- a/source/games/sw/src/jweapon.cpp
+++ b/source/games/sw/src/jweapon.cpp
@@ -1285,7 +1285,7 @@ int PlayerInitChemBomb(PLAYER* pp)
     if (pp->Flags & (PF_DIVING) || SpriteInUnderwaterArea(actorNew))
         actorNew->user.Flags |= (SPR_UNDERWATER);
 
-    actorNew->vel.Z += pp->horizon.horiz.Tan() * HORIZ_MULTF;
+    setFreeAimVelocity(actorNew->vel.X, actorNew->vel.Z, pp->horizon.horiz, HORIZ_MULTF);
 
     double oclipdist = plActor->clipdist;
     plActor->clipdist = 0;