diff --git a/picom.nix b/picom.nix
index c6b677d..3dcfa4d 100644
--- a/picom.nix
+++ b/picom.nix
@@ -4,10 +4,13 @@
   services.picom = {
     enable = true;
     settings = {
+      backend = "glx"; # Fixes black backdrop on some rounded corners
       corner-radius = 12;
       round-borders = 1;
-      rounded-borders-exclude = [
-        # TODO: figure out how to exclude polybar, smart gaps
+      # Ignore polybar
+      rounded-corners-exclude = [
+        "window_type = 'dock'"
+        "window_type = 'desktop'"
       ];
     };
   };