diff --git a/src/cmph.h b/src/cmph.h
index 1e7da9f..f457736 100644
--- a/src/cmph.h
+++ b/src/cmph.h
@@ -24,9 +24,10 @@ typedef struct
 } cmph_io_adapter_t;
 
 /** Adapter pattern API **/
+/* please call free() in the created adapters */
 cmph_io_adapter_t *cmph_io_nlfile_adapter(FILE * keys_fd);
 cmph_io_adapter_t *cmph_io_nlnkfile_adapter(FILE * keys_fd, cmph_uint32 nkeys);
-cmph_io_adapter_t *cmph_io_vector_adapter(const char ** vector, cmph_uint32 nkeys);
+/*cmph_io_adapter_t *cmph_io_vector_adapter(const char ** vector, cmph_uint32 nkeys);*/
 
 /** Hash configuration API **/
 cmph_config_t *cmph_config_new(cmph_io_adapter_t *key_source);