diff --git a/buffer.c b/buffer.c
index 744c8a9e..98f5a0b2 100644
--- a/buffer.c
+++ b/buffer.c
@@ -444,7 +444,7 @@ evbuffer_run_callbacks(struct evbuffer *buffer, int running_deferred)
 	}
 }
 
-static inline void
+void
 evbuffer_invoke_callbacks(struct evbuffer *buffer)
 {
 	if (TAILQ_EMPTY(&buffer->callbacks)) {
diff --git a/buffer_iocp.c b/buffer_iocp.c
index f3f96f44..2d3a1b17 100644
--- a/buffer_iocp.c
+++ b/buffer_iocp.c
@@ -126,6 +126,9 @@ evbuffer_commit_read(struct evbuffer *evbuf, ev_ssize_t nBytes)
 	buf->read_in_progress = 0;
 
 	evbuf->total_len += nBytes;
+	evbuf->n_add_for_cb += nBytes;
+
+	evbuffer_invoke_callbacks(evbuf);
 
 	_evbuffer_decref_and_unlock(evbuf);
 }
diff --git a/evbuffer-internal.h b/evbuffer-internal.h
index 7fc8b914..5879f874 100644
--- a/evbuffer-internal.h
+++ b/evbuffer-internal.h
@@ -270,6 +270,8 @@ int _evbuffer_read_setup_vecs(struct evbuffer *buf, ev_ssize_t howmuch,
 /** Set the parent bufferevent object for buf to bev */
 void evbuffer_set_parent(struct evbuffer *buf, struct bufferevent *bev);
 
+void evbuffer_invoke_callbacks(struct evbuffer *buf);
+
 #ifdef __cplusplus
 }
 #endif