diff --git a/src/vector.hpp b/src/vector.hpp
index a649080..41dd2b8 100644
--- a/src/vector.hpp
+++ b/src/vector.hpp
@@ -105,6 +105,9 @@ namespace cloonel {
 	template <typename T, typename U, uint32_t S>
 	bool operator!= ( const Vector<T, S>& parA, const Vector<U, S>& parB ) __attribute__((pure));
 
+	template <typename T, uint32_t S>
+	Vector<T, S> operator- ( Vector<T, S> parOperand ) __attribute__((pure));
+
 	typedef Vector<float, 2> float2;
 	typedef Vector<uint16_t, 2> ushort2;
 	typedef Vector<int32_t, 2> int2;
diff --git a/src/vector.inl b/src/vector.inl
index 98e3d12..2059621 100644
--- a/src/vector.inl
+++ b/src/vector.inl
@@ -245,4 +245,12 @@ namespace cloonel {
 		}
 		return retVal;
 	}
+
+	template <typename T, uint32_t S>
+	Vector<T, S> operator- (Vector<T, S> parOperand) {
+		for (uint32_t z = 0; z < S; ++z) {
+			parOperand[z] = -parOperand[z];
+		}
+		return parOperand;
+	}
 } //namespace cloonel