Index: code/mission/missionparse.cpp
===================================================================
--- code/mission/missionparse.cpp	(revision 10978)
+++ code/mission/missionparse.cpp	(working copy)
@@ -2587,8 +2587,6 @@
 	// Make sure that the correct flag is set in any case
 	if (parse_flags2 & P2_OF_NO_COLLIDE)
 		obj_set_flags(objp, objp->flags & ~OF_COLLIDES);
-	else
-		obj_set_flags(objp, objp->flags | OF_COLLIDES);
 }
 
 void fix_old_special_explosions(p_object *p_objp, int variable_index)