--- a/db.c	2024-01-03 10:36:30.009600848 +0100
+++ b/db.c	2024-02-21 11:35:04.420115207 +0100
@@ -283,8 +283,10 @@
 	BCOPY(e, ep->e, 6);
 	if (h == NULL && !initializing)
 		h = getsname(a);
-	if (h != NULL && !isdigit((int)*h))
-		strcpy(ep->h, h);
+	if (h != NULL) {
+		strncpy(ep->h, h, sizeof(ep->h));
+		ep->h[sizeof(ep->h) - 1] = '\0';
+	}
 	ep->t = t;
 	return (ep);
 }