diff --git a/source/games/sw/src/weapon.cpp b/source/games/sw/src/weapon.cpp
index 8a25931a7..fa3e83e33 100644
--- a/source/games/sw/src/weapon.cpp
+++ b/source/games/sw/src/weapon.cpp
@@ -15910,7 +15910,7 @@ int InitTurretRail(DSWActor* actor, PLAYER* pp)
     SetOwner(pp->actor, actorNew);
     actorNew->spr.scale = DVector2(0.8125, 0.8125);
     actorNew->spr.shade = -15;
-    actorNew->vel.Z = pp->horizon.horiz.Tan() * HORIZ_MULTF;
+    setFreeAimVelocity(actorNew->vel.X, actorNew->vel.Z, pp->horizon.horiz, HORIZ_MULTF);
 
     actorNew->user.RotNum = 5;
     NewStateGroup(actorNew, &sg_Rail[0]);