diff --git a/HISTORY b/HISTORY
index 899e6e2..e4c315a 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,5 +1,5 @@
 
-Version 1.16  2015-06-19
+Version 1.16  2015-06-25
   * fast_mblock add fast_mblock_delay_free
 
 Version 1.15  2015-06-16
diff --git a/src/fast_mblock.h b/src/fast_mblock.h
index b33c9cf..0a54692 100644
--- a/src/fast_mblock.h
+++ b/src/fast_mblock.h
@@ -149,7 +149,7 @@ parameters:
     delay: delay seconds to free
 return 0 for success, return none zero if fail
 */
-int fast_mblock_delay_free_object(struct fast_mblock_man *mblock,
+static inline int fast_mblock_delay_free_object(struct fast_mblock_man *mblock,
         void *object, const int delay)
 {
     return fast_mblock_delay_free(mblock, fast_mblock_to_node_ptr(object), delay);