diff --git a/optionals/compat_r3f/CfgWeapons.hpp b/optionals/compat_r3f/CfgWeapons.hpp
index fd2619a402..bb1ed0ebd5 100644
--- a/optionals/compat_r3f/CfgWeapons.hpp
+++ b/optionals/compat_r3f/CfgWeapons.hpp
@@ -1,3 +1,5 @@
+class Mode_SemiAuto;
+
 class CfgWeapons {
     class Pistol_Base_F;
     class Rifle_Base_F;