1 files changed, 3 insertions, 0 deletions
diff --git a/src/hash.h b/src/hash.h
index c2ed749..277fd3f 100644
--- a/src/hash.h
+++ b/src/hash.h
@@ -89,3 +89,6 @@ void *hash_getkeyptr(void*, const void *key);
 size_t hash_size(void*);
 
 void *hash_dup(void*);
+
+/* sets the callback for when duplicating a data node */
+void hash_setdupdata_cb(void*, void *(*cb)(void*));