diff --git a/include/proto/protocols.h b/include/proto/protocols.h
index c5efd0cad..cd54ec8ee 100644
--- a/include/proto/protocols.h
+++ b/include/proto/protocols.h
@@ -58,6 +58,12 @@ int disable_all_listeners(struct protocol *proto);
  */
 int unbind_listener(struct listener *listener);
 
+/* This function closes all listening sockets bound to the protocol <proto>,
+ * and the listeners end in LI_ASSIGNED state if they were higher. It does not
+ * detach them from the protocol. It always returns ERR_NONE.
+ */
+int unbind_all_listeners(struct protocol *proto);
+
 /* Delete a listener from its protocol's list of listeners. The listener's
  * state is automatically updated from LI_ASSIGNED to LI_INIT. The protocol's
  * number of listeners is updated. Note that the listener must have previously
diff --git a/src/protocols.c b/src/protocols.c
index 294edefa7..70d04de4c 100644
--- a/src/protocols.c
+++ b/src/protocols.c
@@ -100,6 +100,19 @@ int unbind_listener(struct listener *listener)
 	return ERR_NONE;
 }
 
+/* This function closes all listening sockets bound to the protocol <proto>,
+ * and the listeners end in LI_ASSIGNED state if they were higher. It does not
+ * detach them from the protocol. It always returns ERR_NONE.
+ */
+int unbind_all_listeners(struct protocol *proto)
+{
+	struct listener *listener;
+
+	list_for_each_entry(listener, &proto->listeners, proto_list)
+		unbind_listener(listener);
+	return ERR_NONE;
+}
+
 /* Delete a listener from its protocol's list of listeners. The listener's
  * state is automatically updated from LI_ASSIGNED to LI_INIT. The protocol's
  * number of listeners is updated. Note that the listener must have previously