diff --git a/plugins/lsp.nix b/plugins/lsp.nix
index ea68bab..dc50199 100644
--- a/plugins/lsp.nix
+++ b/plugins/lsp.nix
@@ -42,6 +42,7 @@
           enable = true;
           type = ["alejandra"];
         };
+        extraDiagnostics.types = ["deadnix"];
       };
 
       clang = {