diff --git a/libraries/AP_Math/vector2.h b/libraries/AP_Math/vector2.h
index bbe380aeb6..9e12b524bf 100644
--- a/libraries/AP_Math/vector2.h
+++ b/libraries/AP_Math/vector2.h
@@ -32,7 +32,7 @@ struct Vector2
 
 
 	// trivial ctor
-	Vector2<T>() {}
+	Vector2<T>(): x(0),y(0) {}
 
 	// setting ctor
 	Vector2<T>(const T x0, const T y0): x(x0), y(y0) {}
diff --git a/libraries/AP_Math/vector3.h b/libraries/AP_Math/vector3.h
index 7c23a5fc63..39d9e31081 100644
--- a/libraries/AP_Math/vector3.h
+++ b/libraries/AP_Math/vector3.h
@@ -50,7 +50,7 @@ public:
 	T x, y, z;
 
 	// trivial ctor
-	Vector3<T>() {}
+	Vector3<T>(): x(0),y(0),z(0) {}
 
 	// setting ctor
 	Vector3<T>(const T x0, const T y0, const T z0): x(x0), y(y0), z(z0) {}