diff --git a/panda/src/gobj/texturePool.cxx b/panda/src/gobj/texturePool.cxx
index 4377767089..987e1947b5 100644
--- a/panda/src/gobj/texturePool.cxx
+++ b/panda/src/gobj/texturePool.cxx
@@ -772,7 +772,7 @@ ns_load_cube_map(const Filename &filename_pattern, bool read_mipmaps,
   nassertr(tex != (Texture *)NULL, NULL);
   tex->set_filename(filename_pattern);
   tex->set_fullpath(filename);
-  tex->_texture_pool_key = filename;
+  tex->_texture_pool_key = unique_filename;
 
   {
     MutexHolder holder(_lock);