diff --git a/include/my_pthread.h b/include/my_pthread.h
index 0be821586a1..2e5f177eea4 100644
--- a/include/my_pthread.h
+++ b/include/my_pthread.h
@@ -721,7 +721,6 @@ struct st_my_thread_var
   mysql_cond_t * volatile current_cond;
   pthread_t pthread_self;
   my_thread_id id;
-  int cmp_length;
   int volatile abort;
   my_bool init;
   struct st_my_thread_var *next,**prev;