diff --git a/src/hidpp10.c b/src/hidpp10.c
index 0c94dfed..0dbad2b9 100644
--- a/src/hidpp10.c
+++ b/src/hidpp10.c
@@ -1057,9 +1057,11 @@ hidpp10_read_memory(struct hidpp10_device *dev, uint8_t page, uint16_t offset,
 }
 
 int
-hidpp10_open_lock(struct hidpp10_device *device)
+hidpp10_open_lock(struct hidpp10_device *device, uint8_t timeout)
 {
-	union hidpp10_message open_lock = CMD_DEVICE_CONNECTION_DISCONNECTION(0x00, CONNECT_DEVICES_OPEN_LOCK, 0x08);
+	union hidpp10_message open_lock = CMD_DEVICE_CONNECTION_DISCONNECTION(0x00,
+									      CONNECT_DEVICES_OPEN_LOCK,
+									      timeout);
 
 	return hidpp10_request_command(device, &open_lock);
 }
diff --git a/src/hidpp10.h b/src/hidpp10.h
index 43f04eb2..ec27724c 100644
--- a/src/hidpp10.h
+++ b/src/hidpp10.h
@@ -469,8 +469,14 @@ hidpp10_read_memory(struct hidpp10_device *dev,
 /* 0xB2: Device Connection and Disconnection (Pairing)                        */
 /* -------------------------------------------------------------------------- */
 
+/**
+ * Open the receiver's lock to allow new devices be paired with this
+ * receiver. The timeout is in seconds, a value of 0 uses the device's
+ * default value (30s).
+ */
 int
-hidpp10_open_lock(struct hidpp10_device *device);
+hidpp10_open_lock(struct hidpp10_device *device, uint8_t timeout);
+
 int
 hidpp10_disconnect(struct hidpp10_device *device, int idx);