diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 063133ec77f49..474deb388fbca 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -1073,7 +1073,7 @@ int iomap_file_buffered_write_punch_delalloc(struct inode *inode,
 {
 	loff_t			start_byte;
 	loff_t			end_byte;
-	int			blocksize = i_blocksize(inode);
+	unsigned int		blocksize = i_blocksize(inode);
 
 	if (iomap->type != IOMAP_DELALLOC)
 		return 0;