diff --git a/src/p_map.c b/src/p_map.c
index 72b17473f..468e2530a 100644
--- a/src/p_map.c
+++ b/src/p_map.c
@@ -2003,7 +2003,7 @@ boolean P_TryMove(mobj_t *thing, fixed_t x, fixed_t y, boolean allowdropoff)
 						thing->z = (thing->ceilingz = thingtop = tmceilingz) - thing->height;
 						thing->eflags |= MFE_JUSTSTEPPEDDOWN;
 					}
-					else if (thingtop == thing->ceilingz && tmceilingz , thingtop && thingtop - tmceilingz <= maxstep)
+					else if (thingtop == thing->ceilingz && tmceilingz < thingtop && thingtop - tmceilingz <= maxstep)
 					{
 						thing->z = (thing->ceilingz = thingtop = tmceilingz) - thing->height;
 						thing->eflags |= MFE_JUSTSTEPPEDDOWN;