diff --git a/modules/misc/qt.nix b/modules/misc/qt.nix
index beb97434..a36bd567 100644
--- a/modules/misc/qt.nix
+++ b/modules/misc/qt.nix
@@ -262,7 +262,7 @@ in {
       (lib.optionals (platformTheme.package != null)
         (lib.toList platformTheme.package))
       (lib.optionals (platformTheme.name != null)
-        platformPackages.${platformTheme.name})
+        platformPackages.${platformTheme.name} or [ ])
     ]) ++ (lib.optionals (cfg.style.package != null)
       (lib.toList cfg.style.package));