diff --git a/modules/plugins/completion/nvim-cmp/nvim-cmp.nix b/modules/plugins/completion/nvim-cmp/nvim-cmp.nix
index d63ed73..06282b6 100644
--- a/modules/plugins/completion/nvim-cmp/nvim-cmp.nix
+++ b/modules/plugins/completion/nvim-cmp/nvim-cmp.nix
@@ -72,7 +72,7 @@ in {
     };
 
     format = mkOption {
-      type = luaInline;
+      type = nullOr luaInline;
       default = mkLuaInline ''
         function(entry, vim_item)
           vim_item.menu = (${toLuaObject cfg.sources})[entry.source.name]