diff --git a/lib/hdb/hdb.c b/lib/hdb/hdb.c
index aff576a30..5dc5a0957 100644
--- a/lib/hdb/hdb.c
+++ b/lib/hdb/hdb.c
@@ -169,7 +169,7 @@ void
 hdb_free_entry(krb5_context context, hdb_entry_ex *ent)
 {
     Key *k;
-    int i;
+    size_t i;
 
     if (ent->free_entry)
 	(*ent->free_entry)(context, ent);