diff --git a/sbin/ffsinfo/ffsinfo.c b/sbin/ffsinfo/ffsinfo.c
index 0ef5e9e0e1d8..1570da5e5f90 100644
--- a/sbin/ffsinfo/ffsinfo.c
+++ b/sbin/ffsinfo/ffsinfo.c
@@ -141,7 +141,7 @@ main(int argc, char **argv)
 	cfg_lv = 0xff;
 	cfg_in = -2;
 	cfg_cg = -2;
-	out_file = "-";
+	out_file = strdup("-");
 
 	while ((ch = getopt(argc, argv, "g:i:l:o:")) != -1) {
 		switch (ch) {