diff --git a/mbcico/scanout.c b/mbcico/scanout.c
index 3dc26338..b6a3faa0 100644
--- a/mbcico/scanout.c
+++ b/mbcico/scanout.c
@@ -81,7 +81,7 @@ static int scan_dir(int (*fn)(faddr *, char, int, char *), char *dname, int ispo
 	strncat(fname,de->d_name,PATH_MAX-strlen(fname)-2);
 
 	if ((strcasecmp(de->d_name+9,"pnt") == 0) && !ispoint) {
-	    sscanf(de->d_name,"%04x%04x",&t_net,&t_node);
+	    sscanf(de->d_name,"%04hx%04hx",&t_net,&t_node);
 	    addr.net = t_net;
 	    addr.node = t_node;
 	    if ((rc = scan_dir(fn, fname, 1)))
@@ -103,10 +103,10 @@ static int scan_dir(int (*fn)(faddr *, char, int, char *), char *dname, int ispo
 		   (strcasecmp(de->d_name+8,".req") == 0) ||
 		   (strcasecmp(de->d_name+8,".pol") == 0)) {
 	    if (ispoint) {
-		sscanf(de->d_name,"%08x", &t_point);
+		sscanf(de->d_name,"%08hx", &t_point);
 		addr.point = t_point;
 	    } else {
-		sscanf(de->d_name,"%04x%04x", &t_net,&t_node);
+		sscanf(de->d_name,"%04hx%04hx", &t_net,&t_node);
 		addr.net = t_net;
 		addr.node = t_node;
 	    }