diff --git a/src/lib.rs b/src/lib.rs
index 16db781a894a..48c16cba240c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -202,6 +202,7 @@ unsafe impl Sync for GccContext {}
 impl WriteBackendMethods for GccCodegenBackend {
     type Module = GccContext;
     type TargetMachine = ();
+    type TargetMachineError = ();
     type ModuleBuffer = ModuleBuffer;
     type ThinData = ();
     type ThinBuffer = ThinBuffer;