diff --git a/code/components/jomjol_mqtt/server_mqtt.cpp b/code/components/jomjol_mqtt/server_mqtt.cpp
index 69789685..4c149657 100644
--- a/code/components/jomjol_mqtt/server_mqtt.cpp
+++ b/code/components/jomjol_mqtt/server_mqtt.cpp
@@ -21,6 +21,7 @@ static const char *TAG = "MQTT SERVER";
 extern const char* libfive_git_version(void);
 extern const char* libfive_git_revision(void);
 extern const char* libfive_git_branch(void);
+extern std::string getFwVersion(void);
 
 std::vector<NumberPost*>* NUMBERS;
 bool HomeassistantDiscovery = false;