diff --git a/src/p_mobj.c b/src/p_mobj.c
index b249e6741..f564a1525 100644
--- a/src/p_mobj.c
+++ b/src/p_mobj.c
@@ -4439,8 +4439,8 @@ static void P_Boss1Thinker(mobj_t *mobj)
 	if (mobj->flags2 & MF2_SKULLFLY)
 	{
 		fixed_t dist = (mobj->eflags & MFE_VERTICALFLIP)
-						? ((mobj->ceilingz-(2*mobj->height)) - (mobj->z+mobj->height))
-						: (mobj->z - (mobj->floorz+(2*mobj->height)));
+			? ((mobj->ceilingz-(2*mobj->height)) - (mobj->z+mobj->height))
+			: (mobj->z - (mobj->floorz+(2*mobj->height)));
 		if (dist > 0 && P_MobjFlip(mobj)*mobj->momz > 0)
 			mobj->momz = FixedMul(mobj->momz, FRACUNIT - (dist>>12));
 	}