diff --git a/modules/lang/data/config.el b/modules/lang/data/config.el
index 0fd18d370..0d0c8823e 100644
--- a/modules/lang/data/config.el
+++ b/modules/lang/data/config.el
@@ -38,9 +38,9 @@
 
 
 ;; For ROM hacking or debugging
-(def-package! hexl-mode
-  :mode "\\.hex$"
-  :mode "\\.nes$")
+(def-package! hexl
+  :mode ("\\.hex$" . hexl-mode)
+  :mode ("\\.nes$" . hexl-mode))
 
 
 ;;