diff --git a/src/dhcpd-pools.h b/src/dhcpd-pools.h
index 3a91e3c..9ebf9b6 100644
--- a/src/dhcpd-pools.h
+++ b/src/dhcpd-pools.h
@@ -244,6 +244,6 @@ void clean_up(void);
 void add_lease(union ipaddr_t *ip, enum ltype type);
 struct leases_t *find_lease(union ipaddr_t *ip);
 void delete_lease(struct leases_t *lease);
-void delete_all_leases();
+void delete_all_leases(void);
 
 #endif				/* DHCPD_POOLS_H */
diff --git a/src/hash.c b/src/hash.c
index 0f1d6d6..f8c46e1 100644
--- a/src/hash.c
+++ b/src/hash.c
@@ -87,8 +87,9 @@ void delete_lease(struct leases_t *lease)
 	free(lease);
 }
 
-/* uthash >= 1.9.2
-void delete_all_leases()
+/*! \brief Delete all leases from hash array. */
+#ifdef HASH_ITER
+void delete_all_leases(void)
 {
 	struct leases_t *l, *tmp;
 	HASH_ITER(hh, leases, l, tmp) {
@@ -96,14 +97,8 @@ void delete_all_leases()
 		free(l);
 	}
 }
-*/
-
-/*! \brief Delete all leases from hash array.
- * FIXME: The prototype should have (void) as an argument.
- * FIXME: Take the HASH_ITER + HASH_DEL in use by if uthash version
- * allows it.
- */
-void delete_all_leases()
+#else
+void delete_all_leases(void)
 {
 	struct leases_t *l;
 	while (leases) {
@@ -113,3 +108,4 @@ void delete_all_leases()
 		free(l);
 	}
 }
+#endif