diff --git a/sbin/nfsd/nfsd.c b/sbin/nfsd/nfsd.c
index 63f4f005c2fb..8e2d14cfa750 100644
--- a/sbin/nfsd/nfsd.c
+++ b/sbin/nfsd/nfsd.c
@@ -585,5 +585,5 @@ setproctitle(a)
 	(void)strncpy(cp, buf, LastArg - cp);
 	cp += strlen(cp);
 	while (cp < LastArg)
-		*cp++ = ' ';
+		*cp++ = '\0';
 }
diff --git a/usr.sbin/nfsd/nfsd.c b/usr.sbin/nfsd/nfsd.c
index 63f4f005c2fb..8e2d14cfa750 100644
--- a/usr.sbin/nfsd/nfsd.c
+++ b/usr.sbin/nfsd/nfsd.c
@@ -585,5 +585,5 @@ setproctitle(a)
 	(void)strncpy(cp, buf, LastArg - cp);
 	cp += strlen(cp);
 	while (cp < LastArg)
-		*cp++ = ' ';
+		*cp++ = '\0';
 }