diff --git a/subsys/dfu/boot/mcuboot.c b/subsys/dfu/boot/mcuboot.c
index 8e1725a1729..1070448cb44 100644
--- a/subsys/dfu/boot/mcuboot.c
+++ b/subsys/dfu/boot/mcuboot.c
@@ -69,7 +69,8 @@ struct mcuboot_v1_raw_header {
 #define BOOT_FLAG_IMAGE_OK  0
 #define BOOT_FLAG_COPY_DONE 1
 
-#define FLASH_MIN_WRITE_SIZE DT_FLASH_WRITE_BLOCK_SIZE
+#define FLASH_MIN_WRITE_SIZE \
+	DT_PROP(DT_CHOSEN(zephyr_flash), write_block_size)
 
 /* DT_FLASH_AREA_IMAGE_XX_YY values used below are auto-generated by DT */
 #ifdef CONFIG_TRUSTED_EXECUTION_NONSECURE
diff --git a/subsys/dfu/img_util/flash_img.c b/subsys/dfu/img_util/flash_img.c
index 543fd8ef967..d437ecff6b4 100644
--- a/subsys/dfu/img_util/flash_img.c
+++ b/subsys/dfu/img_util/flash_img.c
@@ -31,9 +31,12 @@ LOG_MODULE_REGISTER(LOG_MODULE_NAME);
 #define FLASH_AREA_IMAGE_SECONDARY DT_FLASH_AREA_IMAGE_1_ID
 #endif /* CONFIG_TRUSTED_EXECUTION_NONSECURE */
 
-BUILD_ASSERT((CONFIG_IMG_BLOCK_BUF_SIZE % DT_FLASH_WRITE_BLOCK_SIZE == 0),
+#define FLASH_WRITE_BLOCK_SIZE \
+	DT_PROP(DT_CHOSEN(zephyr_flash), write_block_size)
+
+BUILD_ASSERT((CONFIG_IMG_BLOCK_BUF_SIZE % FLASH_WRITE_BLOCK_SIZE == 0),
 	     "CONFIG_IMG_BLOCK_BUF_SIZE is not a multiple of "
-	     "DT_FLASH_WRITE_BLOCK_SIZE");
+	     "FLASH_WRITE_BLOCK_SIZE");
 
 static bool flash_verify(const struct flash_area *fa, off_t offset,
 			 u8_t *data, size_t len)
diff --git a/subsys/net/lib/openthread/platform/openthread-core-zephyr-config.h b/subsys/net/lib/openthread/platform/openthread-core-zephyr-config.h
index 75c95e4e0e5..6741afa0d6d 100644
--- a/subsys/net/lib/openthread/platform/openthread-core-zephyr-config.h
+++ b/subsys/net/lib/openthread/platform/openthread-core-zephyr-config.h
@@ -85,7 +85,8 @@
  * is set in your SOC dts file.
  *
  */
-#define SETTINGS_CONFIG_PAGE_SIZE          DT_FLASH_ERASE_BLOCK_SIZE
+#define SETTINGS_CONFIG_PAGE_SIZE \
+	DT_PROP(DT_CHOSEN(zephyr_flash), erase_block_size)
 
 /**
  * @def SETTINGS_CONFIG_PAGE_NUM
diff --git a/tests/subsys/settings/fcb_init/src/settings_test_fcb_init.c b/tests/subsys/settings/fcb_init/src/settings_test_fcb_init.c
index 3202ddbdb7e..7795bd9dc2d 100644
--- a/tests/subsys/settings/fcb_init/src/settings_test_fcb_init.c
+++ b/tests/subsys/settings/fcb_init/src/settings_test_fcb_init.c
@@ -25,9 +25,11 @@ static u32_t val32;
 
 /* leverage that this area has to be embededd flash part */
 #ifdef DT_FLASH_AREA_IMAGE_0_ID
+#define FLASH_WRITE_BLOCK_SIZE \
+	DT_PROP(DT_CHOSEN(zephyr_flash), write_block_size)
 static const volatile __attribute__((section(".rodata")))
-__aligned(DT_FLASH_WRITE_BLOCK_SIZE)
-u8_t prepared_mark[DT_FLASH_WRITE_BLOCK_SIZE] = {ERASED_VAL};
+__aligned(FLASH_WRITE_BLOCK_SIZE)
+u8_t prepared_mark[FLASH_WRITE_BLOCK_SIZE] = {ERASED_VAL};
 #endif
 
 static int c1_set(const char *name, size_t len, settings_read_cb read_cb,
@@ -88,7 +90,7 @@ void test_prepare_storage(void)
 	int err;
 	const struct flash_area *fa;
 	struct device *dev;
-	u8_t new_val[DT_FLASH_WRITE_BLOCK_SIZE];
+	u8_t new_val[FLASH_WRITE_BLOCK_SIZE];
 
 	if (prepared_mark[0] == ERASED_VAL) {
 		TC_PRINT("First run: erasing the storage\r\n");
@@ -107,7 +109,7 @@ void test_prepare_storage(void)
 		zassert_true(err == 0, "can't unprotect flash");
 
 		(void)memset(new_val, (~ERASED_VAL) & 0xFF,
-			     DT_FLASH_WRITE_BLOCK_SIZE);
+			     FLASH_WRITE_BLOCK_SIZE);
 		err = flash_write(dev, (off_t)&prepared_mark, &new_val,
 				  sizeof(new_val));
 		zassert_true(err == 0, "can't write prepared_mark");