diff --git a/src/image_mad/remotes/fs/fsrc b/src/image_mad/remotes/fs/fsrc
index 4693bd1c75..a55682115b 100644
--- a/src/image_mad/remotes/fs/fsrc
+++ b/src/image_mad/remotes/fs/fsrc
@@ -65,7 +65,7 @@ echo "$IMAGE_REPOSITORY_PATH/`echo $CANONICAL_MD5 | cut -d ' ' -f1`"
 
 function fs_du {
 	if [ -d "$1" ]; then
-		SIZE=`du -s "$1" | cut -f1`
+		SIZE=`du -sb "$1" | cut -f1`
 		error=$?
 	else
 		SIZE=`stat -c %s "$1"`