diff --git a/src/compiler/compiler.c b/src/compiler/compiler.c
index 1a50e3415..fc4540d66 100644
--- a/src/compiler/compiler.c
+++ b/src/compiler/compiler.c
@@ -398,6 +398,8 @@ void compiler_compile(void)
 			}
 			task = &thread_compile_task_tb;
 			break;
+		default:
+			UNREACHABLE
 	}