diff --git a/include/zephyr/arch/arm/mpu/arm_mpu_v7m.h b/include/zephyr/arch/arm/mpu/arm_mpu_v7m.h
index 3732382c767..3b1c6637b8f 100644
--- a/include/zephyr/arch/arm/mpu/arm_mpu_v7m.h
+++ b/include/zephyr/arch/arm/mpu/arm_mpu_v7m.h
@@ -224,6 +224,7 @@ typedef struct {
 			break;                                                                     \
 		default:                                                                           \
 			__is_writable__ = 0;                                                       \
+			break;                                                                     \
 		}                                                                                  \
 		__is_writable__;                                                                   \
 	})