diff --git a/source/build/src/defs.cpp b/source/build/src/defs.cpp
index e597c5a31..4642b214d 100644
--- a/source/build/src/defs.cpp
+++ b/source/build/src/defs.cpp
@@ -768,7 +768,7 @@ static int32_t defsparser(scriptfile *script)
 
             if (have_size)
             {
-                vec2_16_t const orig_size = tileGetSize(tile);
+                vec2_16_t const orig_size = tilesiz[tile];
                 if (orig_size.x != tile_size.x && orig_size.y != tile_size.y)
                 {
                     // initprintf("Size of tile %d doesn't match! Size: (%d, %d), Expected: (%d, %d)\n", tile, orig_size.x, orig_size.y, tile_size.x, tile_size.y);