diff --git a/src/ir_opt/ir_matcher.h b/src/ir_opt/ir_matcher.h
index 8436db4a..82df0646 100644
--- a/src/ir_opt/ir_matcher.h
+++ b/src/ir_opt/ir_matcher.h
@@ -3,6 +3,8 @@
  * SPDX-License-Identifier: 0BSD
  */
 
+#pragma once
+
 #include <optional>
 #include <tuple>