diff --git a/code/modules/asset_cache/asset_list_items.dm b/code/modules/asset_cache/asset_list_items.dm
index 376040b25c..1463584a63 100644
--- a/code/modules/asset_cache/asset_list_items.dm
+++ b/code/modules/asset_cache/asset_list_items.dm
@@ -318,6 +318,7 @@
 		var/imgid = replacetext(replacetext("[k]", "/obj/item/", ""), "/", "-")
 
 		if(sprites[imgid])
+			stack_trace("[imgid] has already been registered in vending products spritesheet!")
 			continue
 
 		if(icon_state in icon_states(icon_file))