diff --git a/libraries/AP_Math/vector2.h b/libraries/AP_Math/vector2.h
index 00fda1aaeb..afd824a042 100644
--- a/libraries/AP_Math/vector2.h
+++ b/libraries/AP_Math/vector2.h
@@ -29,6 +29,10 @@
 ****************************************/
 #pragma once
 
+#ifndef MATH_CHECK_INDEXES
+#define MATH_CHECK_INDEXES 0
+#endif
+
 #include <cmath>
 #include <AP_Common/AP_Common.h>