diff --git a/main/source/pm_shared/pm_shared.cpp b/main/source/pm_shared/pm_shared.cpp
index 912697ff..a58b01ec 100644
--- a/main/source/pm_shared/pm_shared.cpp
+++ b/main/source/pm_shared/pm_shared.cpp
@@ -4941,6 +4941,13 @@ physent_t *PM_Ladder( void )
     
             hull = (hull_t *)pmove->PM_HullForBsp( pe, test );
             num = hull->firstclipnode;
+
+            // Engine returns monster hull (64x64x64) for Onos, but Onos uses custom (64x64x108). We correct it here
+            if (pmove->iuser3 == AVH_USER3_ALIEN_PLAYER5)
+            {
+                hull->clip_mins[2] = -54.0f;
+                hull->clip_maxs[2] = 54.0f;
+            }
     
             // Offset the test point appropriately for this hull.
             VectorSubtract ( pmove->origin, test, test);