diff --git a/reapi/src/natives/natives_hookchains.cpp b/reapi/src/natives/natives_hookchains.cpp
index e0a1d9c..95ef2a2 100644
--- a/reapi/src/natives/natives_hookchains.cpp
+++ b/reapi/src/natives/natives_hookchains.cpp
@@ -322,6 +322,8 @@ cell AMX_NATIVE_CALL SetHookChainArg(AMX *amx, cell *params)
 	case ATYPE_EVARS:
 		*(entvars_t **)destAddr = PEV(*srcAddr);
 		break;
+	default:
+		return FALSE;
 	}
 
 	return TRUE;