diff --git a/src/collision.c b/src/collision.c
index 8a2cedb..b839036 100644
--- a/src/collision.c
+++ b/src/collision.c
@@ -136,7 +136,7 @@ int collision_check(PhysicsEntity a, PhysicsEntity b, Collision* out_a, Collisio
     if(!collision_a_overlaps || !collision_b_overlaps)
         return 0;
 
-    if(vsqrmagnitudef(collision_a.penetration_vector) > vsqrmagnitudef(collision_b.penetration_vector))
+    if(vsqrmagnitudef(collision_a.penetration_vector) <= vsqrmagnitudef(collision_b.penetration_vector))
         collision_b = _internal_collision_invert(collision_a, a);
     else
         collision_a = _internal_collision_invert(collision_b, b);