diff --git a/src/common/dcgraph.cpp b/src/common/dcgraph.cpp
index 9206732e71..9a48f94a75 100644
--- a/src/common/dcgraph.cpp
+++ b/src/common/dcgraph.cpp
@@ -677,7 +677,7 @@ void wxGCDCImpl::DoDrawSpline(const wxPointList *points)
     wxGraphicsPath path = m_graphicContext->CreatePath();
 
     wxPointList::compatibility_iterator node = points->GetFirst();
-    if (node == wxPointList::compatibility_iterator())
+    if ( !node )
         // empty list
         return;