diff --git a/modules/core/env-vars.nix b/modules/core/env-vars.nix
index b5dbc9b..65c48d0 100644
--- a/modules/core/env-vars.nix
+++ b/modules/core/env-vars.nix
@@ -4,5 +4,6 @@
   environment.variables = {
     EDITOR = "vim";
     ADW_DEBUG_COLOR_SCHEME = "prefer-dark";
+    GTK_THEME = "Adwaita:dark";
   };
 }