diff --git a/src/shell/mod.rs b/src/shell/mod.rs
index 6ddd844f..19c7b941 100644
--- a/src/shell/mod.rs
+++ b/src/shell/mod.rs
@@ -2042,10 +2042,7 @@ impl Shell {
     }
 
     pub fn builtin_output(&self) -> Option<&Output> {
-        self.outputs().find(|output| {
-            let name = output.name();
-            name.starts_with("eDP-") || name.starts_with("LVDS-") || name.starts_with("DSI-")
-        })
+        self.outputs().find(|output| output.is_internal())
     }
 
     pub fn global_space(&self) -> Rectangle<i32, Global> {
diff --git a/src/utils/prelude.rs b/src/utils/prelude.rs
index bb30272a..45619003 100644
--- a/src/utils/prelude.rs
+++ b/src/utils/prelude.rs
@@ -22,6 +22,7 @@ use std::{
 };
 
 pub trait OutputExt {
+    fn is_internal(&self) -> bool;
     fn geometry(&self) -> Rectangle<i32, Global>;
     fn zoomed_geometry(&self) -> Option<Rectangle<i32, Global>>;
 
@@ -44,6 +45,11 @@ struct VrrSupport(AtomicU8);
 struct Mirroring(Mutex<Option<WeakOutput>>);
 
 impl OutputExt for Output {
+    fn is_internal(&self) -> bool {
+        let name = self.name();
+        name.starts_with("eDP-") || name.starts_with("LVDS-") || name.starts_with("DSI-")
+    }
+
     fn geometry(&self) -> Rectangle<i32, Global> {
         Rectangle::new(self.current_location(), {
             Transform::from(self.current_transform())