diff -Naur --label qt-x11-free-3.3.8b qt-x11-free-3.3.8b qt-x11-free-3.3.8b/src/tools/qmap.h
--- qt-x11-free-3.3.8b
+++ qt-x11-free-3.3.8b/src/tools/qmap.h	2011-05-10 08:47:27.000000000 -0500
@@ -50,6 +50,7 @@
 #endif // QT_H
 
 #ifndef QT_NO_STL
+#include <cstddef>
 #include <iterator>
 #include <map>
 #endif
@@ -107,7 +108,7 @@
 #endif
     typedef T          value_type;
 #ifndef QT_NO_STL
-    typedef ptrdiff_t  difference_type;
+    typedef std::ptrdiff_t  difference_type;
 #else
     typedef int difference_type;
 #endif
@@ -223,7 +224,7 @@
 #endif
     typedef T          value_type;
 #ifndef QT_NO_STL
-    typedef ptrdiff_t  difference_type;
+    typedef std::ptrdiff_t  difference_type;
 #else
     typedef int difference_type;
 #endif
@@ -604,7 +605,7 @@
     typedef value_type& reference;
     typedef const value_type& const_reference;
 #ifndef QT_NO_STL
-    typedef ptrdiff_t  difference_type;
+    typedef std::ptrdiff_t  difference_type;
 #else
     typedef int difference_type;
 #endif
diff -Naur --label qt-x11-free-3.3.8b qt-x11-free-3.3.8b qt-x11-free-3.3.8b/src/tools/qvaluelist.h
--- qt-x11-free-3.3.8b
+++ qt-x11-free-3.3.8b/src/tools/qvaluelist.h	2011-05-10 08:46:46.000000000 -0500
@@ -50,6 +50,7 @@
 #ifndef QT_NO_STL
 #include <iterator>
 #include <list>
+#include <cstddef>
 #endif
 
 //#define QT_CHECK_VALUELIST_RANGE
diff -Naur --label qt-x11-free-3.3.8b qt-x11-free-3.3.8b qt-x11-free-3.3.8b/src/tools/qvaluevector.h
--- qt-x11-free-3.3.8b
+++ qt-x11-free-3.3.8b/src/tools/qvaluevector.h	2011-05-10 08:46:46.000000000 -0500
@@ -244,7 +244,7 @@
     typedef const value_type& const_reference;
     typedef size_t size_type;
 #ifndef QT_NO_STL
-    typedef ptrdiff_t difference_type;
+    typedef std::ptrdiff_t difference_type;
 #else
     typedef int difference_type;
 #endif