diff --git a/scene/resources/tile_set.cpp b/scene/resources/tile_set.cpp
index efe04ce4e1b..2d117a467bf 100644
--- a/scene/resources/tile_set.cpp
+++ b/scene/resources/tile_set.cpp
@@ -2590,6 +2590,7 @@ void TileSet::_compatibility_conversion() {
 					compatibility_tilemap_mapping_tile_modes[E.key] = COMPATIBILITY_TILE_MODE_SINGLE_TILE;
 
 					TileData *tile_data = atlas_source->get_tile_data(coords, alternative_tile);
+					ERR_CONTINUE(!tile_data);
 
 					tile_data->set_flip_h(flip_h);
 					tile_data->set_flip_v(flip_v);