@@ -170,6 +170,7 @@ mp_map_elem_t *mp_map_lookup(mp_map_t *map, mp_obj_t index, mp_map_lookup_kind_t
     if (map->is_ordered) {
         for (mp_map_elem_t *elem = &map->table[0], *top = &map->table[map->used]; elem < top; elem++) {
             if (elem->key == index || (!compare_only_ptrs && mp_obj_equal(elem->key, index))) {
+                #if MICROPY_PY_COLLECTIONS_ORDEREDDICT
                 if (MP_UNLIKELY(lookup_kind == MP_MAP_LOOKUP_REMOVE_IF_FOUND)) {
                     // remove the found element by moving the rest of the array down
                     mp_obj_t value = elem->value;
@@ -180,9 +181,11 @@ mp_map_elem_t *mp_map_lookup(mp_map_t *map, mp_obj_t index, mp_map_lookup_kind_t
                     elem->key = MP_OBJ_NULL;
                     elem->value = value;
                 }
+                #endif
                 return elem;
             }
         }
+        #if MICROPY_PY_COLLECTIONS_ORDEREDDICT
         if (MP_LIKELY(lookup_kind != MP_MAP_LOOKUP_ADD_IF_NOT_FOUND)) {
             return NULL;
         }
@@ -198,6 +201,9 @@ mp_map_elem_t *mp_map_lookup(mp_map_t *map, mp_obj_t index, mp_map_lookup_kind_t
             map->all_keys_are_qstrs = 0;
         }
         return elem;
+        #else
+        return NULL;
+        #endif
     }
 
     // map is a hash table (not an ordered array), so do a hash lookup
Original file line number	Diff line number	Diff line change
`@@ -170,6 +170,7 @@ mp_map_elem_t mp_map_lookup(mp_map_t map, mp_obj_t index, mp_map_lookup_kind_t`
`170`	`170`	`if (map->is_ordered) {`
`171`	`171`	`for (mp_map_elem_t elem = &map->table[0], top = &map->table[map->used]; elem < top; elem++) {`
`172`	`172`	`if (elem->key == index \|\| (!compare_only_ptrs && mp_obj_equal(elem->key, index))) {`
	`173`	`+ #if MICROPY_PY_COLLECTIONS_ORDEREDDICT`
`173`	`174`	`if (MP_UNLIKELY(lookup_kind == MP_MAP_LOOKUP_REMOVE_IF_FOUND)) {`
`174`	`175`	`// remove the found element by moving the rest of the array down`
`175`	`176`	`mp_obj_t value = elem->value;`
`@@ -180,9 +181,11 @@ mp_map_elem_t mp_map_lookup(mp_map_t map, mp_obj_t index, mp_map_lookup_kind_t`
`180`	`181`	`elem->key = MP_OBJ_NULL;`
`181`	`182`	`elem->value = value;`
`182`	`183`	`}`
	`184`	`+ #endif`
`183`	`185`	`return elem;`
`184`	`186`	`}`
`185`	`187`	`}`
	`188`	`+ #if MICROPY_PY_COLLECTIONS_ORDEREDDICT`
`186`	`189`	`if (MP_LIKELY(lookup_kind != MP_MAP_LOOKUP_ADD_IF_NOT_FOUND)) {`
`187`	`190`	`return NULL;`
`188`	`191`	`}`
`@@ -198,6 +201,9 @@ mp_map_elem_t mp_map_lookup(mp_map_t map, mp_obj_t index, mp_map_lookup_kind_t`
`198`	`201`	`map->all_keys_are_qstrs = 0;`
`199`	`202`	`}`
`200`	`203`	`return elem;`
	`204`	`+ #else`
	`205`	`+ return NULL;`
	`206`	`+ #endif`
`201`	`207`	`}`
`202`	`208`
`203`	`209`	`// map is a hash table (not an ordered array), so do a hash lookup`