diff --git a/src/line.inl b/src/line.inl
index 8487f5c..6aae70b 100644
--- a/src/line.inl
+++ b/src/line.inl
@@ -116,4 +116,17 @@ namespace cloonel {
 		const T dotproduct = dot(linePerp, pt);
 		return (dotproduct <= T(0));
 	}
+
+#if !defined(NDEBUG)
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	template <typename T, uint32_t S>
+	std::ostream& operator<< ( std::ostream& parStream, const Line<T, S>& parLine ) {
+		for (uint32_t z = 0; z < S - 1; ++z) {
+			parStream << parLine[z] << "-";
+		}
+		parStream << parLine[S - 1];
+		return parStream;
+	}
+#endif
 } //namespace cloonel