diff --git a/arch/arc/core/mpu/Kconfig b/arch/arc/core/mpu/Kconfig
index 07f2256a2fd..90674830a1f 100644
--- a/arch/arc/core/mpu/Kconfig
+++ b/arch/arc/core/mpu/Kconfig
@@ -29,5 +29,6 @@ config ARC_MPU
 	select THREAD_STACK_INFO
 	select MEMORY_PROTECTION
 	select MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT if ARC_MPU_VER = 2
+	select MPU_REQUIRES_NON_OVERLAPPING_REGIONS if ARC_MPU_VER = 3
 	help
 	  Target has ARC MPU (currently only works for EMSK 2.2/2.3 ARCEM7D)
diff --git a/include/arch/arc/arch.h b/include/arch/arc/arch.h
index f3d252e8d3e..a2676eb5513 100644
--- a/include/arch/arc/arch.h
+++ b/include/arch/arc/arch.h
@@ -188,8 +188,7 @@ extern "C" {
 #define K_MEM_PARTITION_IS_WRITABLE(attr) \
 	({ \
 		int __is_writable__; \
-		attr &= (AUX_MPU_ATTR_UW | AUX_MPU_ATTR_KW); \
-		switch (attr) { \
+		switch (attr & (AUX_MPU_ATTR_UW | AUX_MPU_ATTR_KW)) { \
 		case (AUX_MPU_ATTR_UW | AUX_MPU_ATTR_KW): \
 		case AUX_MPU_ATTR_UW: \
 		case AUX_MPU_ATTR_KW: \