diff --git a/include/spdk/bdev.h b/include/spdk/bdev.h
index ca498fb37..9d7dd632b 100644
--- a/include/spdk/bdev.h
+++ b/include/spdk/bdev.h
@@ -311,7 +311,6 @@ struct spdk_bdev_io *spdk_bdev_unmap(struct spdk_bdev *bdev, struct spdk_io_chan
 struct spdk_bdev_io *spdk_bdev_flush(struct spdk_bdev *bdev, struct spdk_io_channel *ch,
 				     uint64_t offset, uint64_t length,
 				     spdk_bdev_io_completion_cb cb, void *cb_arg);
-int spdk_bdev_io_submit(struct spdk_bdev_io *bdev_io);
 int spdk_bdev_free_io(struct spdk_bdev_io *bdev_io);
 int spdk_bdev_reset(struct spdk_bdev *bdev, enum spdk_bdev_reset_type,
 		    spdk_bdev_io_completion_cb cb, void *cb_arg);
diff --git a/lib/bdev/bdev.c b/lib/bdev/bdev.c
index 4b54702f2..bc8307008 100644
--- a/lib/bdev/bdev.c
+++ b/lib/bdev/bdev.c
@@ -441,7 +441,7 @@ __submit_request(struct spdk_bdev *bdev, struct spdk_bdev_io *bdev_io, spdk_even
 	}
 }
 
-int
+static int
 spdk_bdev_io_submit(struct spdk_bdev_io *bdev_io)
 {
 	struct spdk_bdev *bdev = bdev_io->bdev;