diff --git a/samples/treectrl/treetest.cpp b/samples/treectrl/treetest.cpp
index 9a0b6e0b30..716b2b3795 100644
--- a/samples/treectrl/treetest.cpp
+++ b/samples/treectrl/treetest.cpp
@@ -417,7 +417,7 @@ void MyFrame::OnSetImageSize(wxCommandEvent& event)
     long size = wxGetNumberFromUser("Enter the size for the images to use",
                                     "Size: ",
                                     "TreeCtrl sample",
-                                    32);
+                                    16);
     if ( size == -1 )
         return;
 
diff --git a/samples/treectrl/treetest.h b/samples/treectrl/treetest.h
index 53ecac8e1d..3e7a37edb5 100644
--- a/samples/treectrl/treetest.h
+++ b/samples/treectrl/treetest.h
@@ -74,7 +74,7 @@ public:
 
     void GetItemsRecursively(const wxTreeItemId& idParent, long cookie);
 
-    void CreateImageList(int size = 32);
+    void CreateImageList(int size = 16);
 
     void AddTestItemsToTree(size_t numChildren, size_t depth);