diff --git a/data/behavior_data.c b/data/behavior_data.c
index 2809d0e38..53814b08e 100644
--- a/data/behavior_data.c
+++ b/data/behavior_data.c
@@ -2606,7 +2606,7 @@ const BehaviorScript bhvSoundSpawner[] = {
 
 const BehaviorScript bhvRockSolid[] = {
     BEGIN(OBJ_LIST_SURFACE),
-    OR_INT(oFlags, (OBJ_FLAG_COMPUTE_DIST_TO_MARIO | OBJ_FLAG_UPDATE_GFX_POS_AND_ANGLE)),
+    OR_LONG(oFlags, (OBJ_FLAG_COMPUTE_DIST_TO_MARIO | OBJ_FLAG_UPDATE_GFX_POS_AND_ANGLE | OBJ_FLAG_UCODE_LARGE)),
     LOAD_COLLISION_DATA(jrb_seg7_collision_rock_solid),
     BEGIN_LOOP(),
         CALL_NATIVE(load_object_collision_model),