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-rw-r--r--src/legacy/cuserid.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/legacy/cuserid.c b/src/legacy/cuserid.c
index 4e78798d..fd7832e4 100644
--- a/src/legacy/cuserid.c
+++ b/src/legacy/cuserid.c
@@ -5,10 +5,12 @@
 
 char *cuserid(char *buf)
 {
+	static char usridbuf[L_cuserid];
 	struct passwd pw, *ppw;
 	long pwb[256];
 	if (getpwuid_r(geteuid(), &pw, (void *)pwb, sizeof pwb, &ppw))
 		return 0;
+	if (!buf) buf = usridbuf;
 	snprintf(buf, L_cuserid, "%s", pw.pw_name);
 	return buf;
 }