diff --git a/firmware_handler.hpp b/firmware_handler.hpp
index 8883176..5790c13 100644
--- a/firmware_handler.hpp
+++ b/firmware_handler.hpp
@@ -160,6 +160,7 @@
 
     void abortVerification();
     bool triggerVerification();
+    void abortUpdate();
     bool triggerUpdate();
 
     /** Allow grabbing the current state. */