diff --git a/subsys/dfu/img_util/flash_img.c b/subsys/dfu/img_util/flash_img.c
index 8f287404da3..322174c0c8f 100644
--- a/subsys/dfu/img_util/flash_img.c
+++ b/subsys/dfu/img_util/flash_img.c
@@ -23,14 +23,18 @@ LOG_MODULE_REGISTER(flash_img, CONFIG_IMG_MANAGER_LOG_LEVEL);
 #include <bootutil/bootutil_public.h>
 #endif
 
+#define FIXED_PARTITION_IS_RUNNING_APP_PARTITION(label) \
+	(FIXED_PARTITION_OFFSET(label) == CONFIG_FLASH_LOAD_OFFSET)
+
 #include <zephyr/devicetree.h>
 #ifdef CONFIG_TRUSTED_EXECUTION_NONSECURE
-	#define UPLOAD_FLASH_AREA_LABEL slot1_ns_partition
+#define UPLOAD_FLASH_AREA_LABEL slot1_ns_partition
 #else
-#if FIXED_PARTITION_EXISTS(slot1_partition)
-	#define UPLOAD_FLASH_AREA_LABEL slot1_partition
+#if FIXED_PARTITION_EXISTS(slot1_partition) && \
+	FIXED_PARTITION_IS_RUNNING_APP_PARTITION(slot0_partition)
+#define UPLOAD_FLASH_AREA_LABEL slot1_partition
 #else
-	#define UPLOAD_FLASH_AREA_LABEL slot0_partition
+#define UPLOAD_FLASH_AREA_LABEL slot0_partition
 #endif
 #endif