diff --git a/wxPython/src/_notebook.i b/wxPython/src/_notebook.i
index 26b9486eed..b87ca2a0ab 100644
--- a/wxPython/src/_notebook.i
+++ b/wxPython/src/_notebook.i
@@ -100,8 +100,8 @@ public:
 
 
     // get/set size of area between book control area and page area
-    size_t GetInternalBorder() const;
-    void SetInternalBorder(size_t internalBorder);
+    unsigned int GetInternalBorder() const;
+    void SetInternalBorder(unsigned int internalBorder);
 
     // returns true if we have wxCHB_TOP or wxCHB_BOTTOM style
     bool IsVertical() const;
diff --git a/wxPython/src/_treectrl.i b/wxPython/src/_treectrl.i
index 841df1aa77..d3f855b0d1 100644
--- a/wxPython/src/_treectrl.i
+++ b/wxPython/src/_treectrl.i
@@ -346,7 +346,7 @@ public:
 
     
     // get the total number of items in the control
-    size_t GetCount() const;
+    unsigned int GetCount() const;
 
     // indent is the number of pixels the children are indented relative to
     // the parents position. SetIndent() also redraws the control