diff --git a/src/sf_nio.c b/src/sf_nio.c
index 1ea93a8..0f115ff 100644
--- a/src/sf_nio.c
+++ b/src/sf_nio.c
@@ -620,7 +620,6 @@ int sf_client_sock_read(int sock, short event, void *arg)
                 task->recv_body = SF_CTX->alloc_recv_buffer(task,
                         task->length - SF_CTX->header_size, &new_alloc);
                 if (new_alloc && task->recv_body == NULL) {
-                    logInfo("recv_body is NULL!!!!!!!!!!!!!!!!!");
                     ioevent_add_to_deleted_list(task);
                     return -1;
                 }
diff --git a/src/sf_shared_mbuffer.c b/src/sf_shared_mbuffer.c
index e5b74ce..c7d5c1c 100644
--- a/src/sf_shared_mbuffer.c
+++ b/src/sf_shared_mbuffer.c
@@ -21,7 +21,6 @@ static int sf_shared_mbuffer_alloc_init(void *element, void *args)
 
     buffer = (SFSharedMBuffer *)((char *)element +
             sizeof(struct fast_allocator_wrapper));
-    buffer->buff = (char *)(buffer + 1);
     buffer->ctx = (SFSharedMBufferContext *)args;
     return 0;
 }
diff --git a/src/sf_shared_mbuffer.h b/src/sf_shared_mbuffer.h
index abc3f34..809d549 100644
--- a/src/sf_shared_mbuffer.h
+++ b/src/sf_shared_mbuffer.h
@@ -27,10 +27,10 @@ typedef struct sf_shared_mbuffer_context {
 } SFSharedMBufferContext;
 
 typedef struct sf_shared_mbuffer {
-    char *buff;
     int length;
     volatile int reffer_count;
     SFSharedMBufferContext *ctx;
+    char buff[0];  //must be last
 } SFSharedMBuffer;
 
 #ifdef __cplusplus