diff --git a/src/p_slopes.c b/src/p_slopes.c
index a9706eb9..c516fa97 100644
--- a/src/p_slopes.c
+++ b/src/p_slopes.c
@@ -790,10 +790,6 @@ void P_SlopeLaunch(mobj_t *mo)
 {
 	if (!(mo->standingslope->flags & SL_NOPHYSICS)) // If there's physics, time for launching.
 	{
-#ifdef GROWNEVERMISSES
-		const fixed_t xyscale = mapheaderinfo[gamemap-1]->mobj_scale + (mapheaderinfo[gamemap-1]->mobj_scale - mo->scale);
-		const fixed_t zscale = mapheaderinfo[gamemap-1]->mobj_scale + (mapheaderinfo[gamemap-1]->mobj_scale - mo->scale);
-#endif
 		// Double the pre-rotation Z, then halve the post-rotation Z. This reduces the
 		// vertical launch given from slopes while increasing the horizontal launch
 		// given. Good for SRB2's gravity and horizontal speeds.
@@ -804,9 +800,13 @@ void P_SlopeLaunch(mobj_t *mo)
 		P_QuantizeMomentumToSlope(&slopemom, mo->standingslope);
 
 #ifdef GROWNEVERMISSES
-		mo->momx = FixedMul(slopemom.x, xyscale);
-		mo->momy = FixedMul(slopemom.y, xyscale);
-		mo->momz = FixedMul(slopemom.z, zscale);
+		{
+			const fixed_t xyscale = mapheaderinfo[gamemap-1]->mobj_scale + (mapheaderinfo[gamemap-1]->mobj_scale - mo->scale);
+			const fixed_t zscale = mapheaderinfo[gamemap-1]->mobj_scale + (mapheaderinfo[gamemap-1]->mobj_scale - mo->scale);
+			mo->momx = FixedMul(slopemom.x, xyscale);
+			mo->momy = FixedMul(slopemom.y, xyscale);
+			mo->momz = FixedMul(slopemom.z, zscale);
+		}
 #else
 		mo->momx = slopemom.x;
 		mo->momy = slopemom.y;