Index: gui/qgscontinuouscolorrenderer.cpp
===================================================================
--- gui/qgscontinuouscolorrenderer.cpp	(revision 5017)
+++ gui/qgscontinuouscolorrenderer.cpp	(working copy)
@@ -54,6 +54,7 @@
 	mMinimumSymbol = new QgsSymbol(*other.mMinimumSymbol);
 	mMaximumSymbol = new QgsSymbol(*other.mMaximumSymbol);
     }
+    return *this;
 }
 
 QgsContinuousColorRenderer::~QgsContinuousColorRenderer()