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-rw-r--r--src/bin/pg_waldump/compat.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/bin/pg_waldump/compat.c b/src/bin/pg_waldump/compat.c
index 6ff9eb7e77b..6d73f557d30 100644
--- a/src/bin/pg_waldump/compat.c
+++ b/src/bin/pg_waldump/compat.c
@@ -58,7 +58,8 @@ timestamptz_to_str(TimestampTz dt)
strftime(ts, sizeof(ts), "%Y-%m-%d %H:%M:%S", ltime);
strftime(zone, sizeof(zone), "%Z", ltime);
- sprintf(buf, "%s.%06d %s", ts, (int) (dt % USECS_PER_SEC), zone);
+ snprintf(buf, sizeof(buf), "%s.%06d %s",
+ ts, (int) (dt % USECS_PER_SEC), zone);
return buf;
}