diff --git a/src/twn_textures.c b/src/twn_textures.c
index ffd9fdc..5688a49 100644
--- a/src/twn_textures.c
+++ b/src/twn_textures.c
@@ -231,7 +231,7 @@ static bool update_rects(struct texture_cache *cache, stbrp_rect *rects, stbrp_r
 /* updates the atlas location of every rect in the cache */
 static void update_texture_rects_in_atlas(struct texture_cache *cache, stbrp_rect *rects) {
     int r = 0;
-    for (size_t i = 0; i < arrlenu(rects); ++i) {
+    for (size_t i = 0; i < shlenu(cache->hash); ++i) {
         if (cache->hash[i].value.loner_texture != 0)
             continue;