diff --git a/include/wx/dcgraph.h b/include/wx/dcgraph.h
index df10beeb96..b002a0408a 100644
--- a/include/wx/dcgraph.h
+++ b/include/wx/dcgraph.h
@@ -32,7 +32,7 @@ public:
     wxGCDC();
     virtual ~wxGCDC();
 
-    wxGraphicsContext* GetGraphicsContext();
+    wxGraphicsContext* GetGraphicsContext() const;
     void SetGraphicsContext( wxGraphicsContext* ctx );
 
 #ifdef __WXMSW__
@@ -103,7 +103,7 @@ public:
 
     virtual void ComputeScaleAndOrigin();
 
-    wxGraphicsContext* GetGraphicsContext() { return m_graphicContext; }
+    wxGraphicsContext* GetGraphicsContext() const { return m_graphicContext; }
     virtual void SetGraphicsContext( wxGraphicsContext* ctx );
 
     // the true implementations
diff --git a/interface/wx/dcgraph.h b/interface/wx/dcgraph.h
index 345d015acf..acd5b58b2d 100644
--- a/interface/wx/dcgraph.h
+++ b/interface/wx/dcgraph.h
@@ -38,6 +38,6 @@ public:
     /**
        Retrieves associated wxGraphicsContext
     */
-    wxGraphicsContext* GetGraphicsContext();
+    wxGraphicsContext* GetGraphicsContext() const;
 };
 
diff --git a/src/common/dcgraph.cpp b/src/common/dcgraph.cpp
index 8cf95f3f9b..ab615e482f 100644
--- a/src/common/dcgraph.cpp
+++ b/src/common/dcgraph.cpp
@@ -123,7 +123,7 @@ wxGCDC::~wxGCDC()
 {
 }
 
-wxGraphicsContext* wxGCDC::GetGraphicsContext()
+wxGraphicsContext* wxGCDC::GetGraphicsContext() const
 {
     if (!m_pimpl) return NULL;
     wxGCDCImpl *gc_impl = (wxGCDCImpl*) m_pimpl;