--- a/demos/composition/composition.cpp	Tue Jan 26 12:42:25 2010 +0200
+++ b/demos/composition/composition.cpp	Tue Feb 02 00:43:10 2010 +0200
@@ -457,7 +457,7 @@
 #ifdef Q_WS_QWS
         m_buffer = m_base_buffer;
 #else
-        memcpy(m_buffer.bits(), m_base_buffer.bits(), m_buffer.numBytes());
+        memcpy(m_buffer.bits(), m_base_buffer.bits(), m_buffer.byteCount());
 #endif
 
         {