diff --git a/include/wx/gtk/combobox.h b/include/wx/gtk/combobox.h
index 6fc045a704..63304d121f 100644
--- a/include/wx/gtk/combobox.h
+++ b/include/wx/gtk/combobox.h
@@ -90,6 +90,7 @@ public:
     int Number() const;
     void SetSelection( int n );
     void SetStringSelection( const wxString &string );
+    void SetString(int n, const wxString &text);
 
     wxString GetValue() const;
     void SetValue(const wxString& value);
diff --git a/include/wx/gtk1/combobox.h b/include/wx/gtk1/combobox.h
index 6fc045a704..63304d121f 100644
--- a/include/wx/gtk1/combobox.h
+++ b/include/wx/gtk1/combobox.h
@@ -90,6 +90,7 @@ public:
     int Number() const;
     void SetSelection( int n );
     void SetStringSelection( const wxString &string );
+    void SetString(int n, const wxString &text);
 
     wxString GetValue() const;
     void SetValue(const wxString& value);