--- a/src/devices/wifi/adhoc-wifi-mac.h	Sun Mar 02 06:32:03 2008 +0100
+++ b/src/devices/wifi/adhoc-wifi-mac.h	Sun Mar 02 06:43:12 2008 +0100
@@ -79,7 +79,7 @@
   Ptr<WifiPhy> m_phy;
   DcfManager *m_dcfManager;
   MacRxMiddle *m_rxMiddle;
-  MacLow *m_low;
+  Ptr<MacLow> m_low;
   Mac48Address m_address;
   Ssid m_ssid;
 };