diff --git a/src/getdata.c b/src/getdata.c
index ff05804..31734de 100644
--- a/src/getdata.c
+++ b/src/getdata.c
@@ -148,7 +148,9 @@ int parse_leases(struct conf_t *state)
 			if ((lease = find_lease(state, &addr)) != NULL) {
 				lease->ethernet = xstrdup(macstring);
 				lease->starts = xstrdup(startsstr);
+				startsstr[0] = '\0';
 				lease->ends = xstrdup(endsstr);
+				endsstr[0] = '\0';
 			}
 			break;
 		case PREFIX_ENDS:
@@ -171,6 +173,7 @@ int parse_leases(struct conf_t *state)
 			if ((lease = find_lease(state, &addr)) != NULL) {
 				lease->hostname = xstrdup(hostnamestr);
 			}
+			hostnamestr[0] = '\0';
 			break;
 		default:
 			/* do nothing */ ;