diff --git a/src/x11/colour.cpp b/src/x11/colour.cpp
index dfe438e1c4..cf8431a8cc 100644
--- a/src/x11/colour.cpp
+++ b/src/x11/colour.cpp
@@ -35,6 +35,13 @@ public:
         m_colormap = (WXColormap *) NULL;
         m_hasPixel = FALSE;
     }
+    wxColourRefData(const wxColourRefData& data):
+        wxObjectRefData()
+    {
+        m_color = data.m_color;
+        m_colormap = data.m_colormap;
+        m_hasPixel = data.m_hasPixel;
+    }
     
     ~wxColourRefData()
     {