diff --git a/Adafruit_MQTT.h b/Adafruit_MQTT.h
index 1fbd755..e567d47 100644
--- a/Adafruit_MQTT.h
+++ b/Adafruit_MQTT.h
@@ -198,6 +198,7 @@ class Adafruit_MQTT {
   uint8_t connectPacket(uint8_t *packet);
   uint8_t publishPacket(uint8_t *packet, const char *topic, const char *payload, uint8_t qos);
   uint8_t subscribePacket(uint8_t *packet, const char *topic, uint8_t qos);
+  uint8_t unsubscribePacket(uint8_t *packet, const char *topic);
   uint8_t pingPacket(uint8_t *packet);
 };