Initialize __progname as NULL
diff --git a/src/progname.c b/src/progname.c
index c74d675..c024d09 100644
--- a/src/progname.c
+++ b/src/progname.c
@@ -21,7 +21,7 @@
#include <bsd/stdlib.h>
-static char *__progname;
+static char *__progname = NULL;
char *
getprogname ();