diff --git a/cranelift-backend/src/lib.rs b/cranelift-backend/src/lib.rs
index 3c3002a..70e82ea 100644
--- a/cranelift-backend/src/lib.rs
+++ b/cranelift-backend/src/lib.rs
@@ -91,7 +91,6 @@ impl hblang::backend::Backend for Backend {
 
         self.globals.shadow(types.ins.globals.len());
 
-        #[cfg(debug_assertions)]
         let mut seen_names = HashSet::new();
 
         self.asm.frontier.push(from.into());