diff --git a/src/helpers/XWaylandStubs.hpp b/src/helpers/XWaylandStubs.hpp
index 39eaa5e0..b3a5806a 100644
--- a/src/helpers/XWaylandStubs.hpp
+++ b/src/helpers/XWaylandStubs.hpp
@@ -169,8 +169,4 @@ inline wlr_xwayland_surface* wlr_xwayland_surface_try_from_wlr_surface(wlr_surfa
 
 inline bool wlr_xwayland_or_surface_wants_focus(const wlr_xwayland_surface*) {
     return false;
-}
-
-inline bool wlr_backend_is_x11(void*) {
-    return false;
 }
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