diff --git a/cdb/cdb_make.c b/cdb/cdb_make.c
index 95f517a..3c2efc8 100644
--- a/cdb/cdb_make.c
+++ b/cdb/cdb_make.c
@@ -31,7 +31,7 @@ static int posplus(struct cdb_make *c,uint32 len) {
   return 0;
 }
 
-int cdb_make_addend(struct cdb_make *c,unsigned long int keylen,unsigned long int datalen,uint32 h) {
+int cdb_make_addend(struct cdb_make *c,size_t keylen,size_t datalen,uint32 h) {
   struct cdb_hplist *head;
 
   head = c->head;
diff --git a/cdb/cdb_traverse.c b/cdb/cdb_traverse.c
index 5fbfb80..e03d16b 100644
--- a/cdb/cdb_traverse.c
+++ b/cdb/cdb_traverse.c
@@ -27,7 +27,7 @@ int cdb_nextkey(struct cdb *c,uint32 *kpos) {
   return doit(c,kpos);
 }
 
-int cdb_successor(struct cdb *c,const unsigned char *key,unsigned long int klen) {
+int cdb_successor(struct cdb *c,const unsigned char *key,size_t klen) {
   int r;
   uint32 kpos;
   if (key) {