diff --git a/libraries/AP_Math/matrix3.h b/libraries/AP_Math/matrix3.h
index f389c61d24..766dbadbd7 100644
--- a/libraries/AP_Math/matrix3.h
+++ b/libraries/AP_Math/matrix3.h
@@ -59,13 +59,6 @@ public:
 	bool operator != (const Matrix3<T> &m)
 	{	return (a!=m.a || b!=m.b || c!=m.c);	}
 
-	// set to value
-	Matrix3<T> &operator = (const Matrix3<T> &m)
-	{
-		a= m.a; b= m.b;	c= m.c;
-		return *this;
-	}
-
 	// negation
 	const Matrix3<T> operator - (void) const
 	{	return Matrix3<T>(-a,-b,-c);	}
diff --git a/libraries/AP_Math/vector2.h b/libraries/AP_Math/vector2.h
index 7fbab08952..6547d0d4e6 100644
--- a/libraries/AP_Math/vector2.h
+++ b/libraries/AP_Math/vector2.h
@@ -57,13 +57,6 @@ struct Vector2
 	bool operator!=(const Vector2<T> &v)
 	{	return (x!=v.x || y!=v.y);	}
 
-	// set to value
-	Vector2<T> &operator =(const Vector2<T> &v)
-	{
-		x= v.x; y= v.y;
-		return *this;
-	}
-
 	// negation
 	const Vector2<T> operator -(void) const
 	{	return Vector2<T>(-x, -y);	}
diff --git a/libraries/AP_Math/vector3.h b/libraries/AP_Math/vector3.h
index 2b80352438..8a56f2a7ef 100644
--- a/libraries/AP_Math/vector3.h
+++ b/libraries/AP_Math/vector3.h
@@ -67,13 +67,6 @@ public:
 	bool operator!=(const Vector3<T> &v)
 	{	return (x!=v.x || y!=v.y || z!=v.z);	}
 
-	// set to value
-	Vector3<T> &operator =(const Vector3<T> &v)
-	{
-		x= v.x; y= v.y;	z= v.z;
-		return *this;
-	}
-
 	// negation
 	const Vector3<T> operator -(void) const
 	{	return Vector3<T>(-x,-y,-z);	}