diff --git a/src/modules/commander/state_machine_helper.cpp b/src/modules/commander/state_machine_helper.cpp
index 9227a141de..1fa2e27a89 100644
--- a/src/modules/commander/state_machine_helper.cpp
+++ b/src/modules/commander/state_machine_helper.cpp
@@ -64,12 +64,6 @@
 #include "commander_helper.h"
 #include "PreflightCheck.h"
 
-/* oddly, ERROR is not defined for c++ */
-#ifdef ERROR
-# undef ERROR
-#endif
-static const int ERROR = -1;
-
 // This array defines the arming state transitions. The rows are the new state, and the columns
 // are the current state. Using new state and current  state you can index into the array which
 // will be true for a valid transition or false for a invalid transition. In some cases even