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-rw-r--r--save-xml.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/save-xml.c b/save-xml.c
index cf7ccfec7..c9adf5307 100644
--- a/save-xml.c
+++ b/save-xml.c
@@ -520,7 +520,7 @@ void save_dives_buffer(struct membuffer *b, const bool select_only)
put_format(b, "<divelog program='subsurface' version='%d'>\n<settings>\n", VERSION);
if (prefs.save_userid_local)
- put_format(b, " <userid>%s</userid>\n", prefs.userid);
+ put_format(b, " <userid>%30s</userid>\n", prefs.userid);
/* save the dive computer nicknames, if any */
call_for_each_dc(b, save_one_device);