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-rw-r--r--src/rbd.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/rbd.cc b/src/rbd.cc
index 79860c2d772..3e586bd4dcb 100644
--- a/src/rbd.cc
+++ b/src/rbd.cc
@@ -1141,7 +1141,7 @@ static int do_export_diff(librbd::Image& image, const char *fromsnapname,
__u8 tag = 'e';
bufferlist bl;
::encode(tag, bl);
- bl.write_fd(fd);
+ r = bl.write_fd(fd);
if (r < 0)
return r;
}