diff --git a/include/dfu/flash_img.h b/include/dfu/flash_img.h
index 4d2593c01d..a21664b412 100644
--- a/include/dfu/flash_img.h
+++ b/include/dfu/flash_img.h
@@ -8,12 +8,12 @@
 #ifndef ZEPHYR_INCLUDE_DFU_FLASH_IMG_H_
 #define ZEPHYR_INCLUDE_DFU_FLASH_IMG_H_
 
+#include <storage/flash_map.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-#include <storage/flash_map.h>
-
 struct flash_img_context {
 	u8_t buf[CONFIG_IMG_BLOCK_BUF_SIZE];
 	const struct flash_area *flash_area;