diff --git a/src/gpu/mod.rs b/src/gpu/mod.rs
index 200aed74..4b5fd41d 100644
--- a/src/gpu/mod.rs
+++ b/src/gpu/mod.rs
@@ -26,6 +26,7 @@ impl Engine {
 #[cfg(feature = "metal")]
 pub use crate::gpu::metal::autoreleasepool as runloop;
 #[cfg(not(feature = "metal"))]
+#[allow(dead_code)]
 pub fn runloop<T, F: FnOnce() -> T>(f: F) -> T { f() }
 
 #[derive(Copy, Clone, Debug)]