diff --git a/examples/c++/button.cxx b/examples/c++/button.cxx
index 5baf12d9..8e12d463 100644
--- a/examples/c++/button.cxx
+++ b/examples/c++/button.cxx
@@ -24,7 +24,7 @@
 
 #include <unistd.h>
 #include <iostream>
-#include "grove.hpp"
+#include "button.hpp"
 
 int
 main(int argc, char **argv)
diff --git a/include/upm_fti.h b/include/upm_fti.h
index 7ad42355..69b3c294 100644
--- a/include/upm_fti.h
+++ b/include/upm_fti.h
@@ -43,6 +43,7 @@ typedef enum {
     UPM_CURRENT,
     UPM_DISPLAY,
     UPM_DISTANCE,
+    UPM_EC,
     UPM_ELECTRICITY,
     UPM_FLOW,
     UPM_FORCE,