diff --git a/include/osmocore/write_queue.h b/include/osmocore/write_queue.h
index 64d4159..ef244c3 100644
--- a/include/osmocore/write_queue.h
+++ b/include/osmocore/write_queue.h
@@ -35,6 +35,7 @@
 
 	int (*read_cb)(struct bsc_fd *fd);
 	int (*write_cb)(struct bsc_fd *fd, struct msgb *msg);
+	int (*except_cb)(struct bsc_fd *fd);
 };
 
 void write_queue_init(struct write_queue *queue, int max_length);
diff --git a/src/write_queue.c b/src/write_queue.c
index a0ac2d6..618a8c0 100644
--- a/src/write_queue.c
+++ b/src/write_queue.c
@@ -32,6 +32,9 @@
 	if (what & BSC_FD_READ)
 		queue->read_cb(fd);
 
+	if (what & BSC_FD_EXCEPT)
+		queue->except_cb(fd);
+
 	if (what & BSC_FD_WRITE) {
 		struct msgb *msg;