diff --git a/panda/board/safety/safety_mazda.h b/panda/board/safety/safety_mazda.h
index 17621559b..1c97ebfd2 100644
--- a/panda/board/safety/safety_mazda.h
+++ b/panda/board/safety/safety_mazda.h
@@ -275,7 +275,7 @@ static int mazda_fwd_hook(int bus, int addr) {
   int bus_fwd = -1;
   bool block = (addr == MAZDA_TI_LKAS);
   if (bus == MAZDA_MAIN) {
-    block |= ((addr == MAZDA_2019_ACC | addr == MAZDA_2023_ACC) && (gen2 || gen3));
+    block |= ((addr == MAZDA_2019_ACC || addr == MAZDA_2023_ACC) && (gen2 || gen3));
     if (!block) {
       bus_fwd = MAZDA_CAM;
     }