Index: /trunk/Mars/mcore/izstream.h
===================================================================
--- /trunk/Mars/mcore/izstream.h	(revision 17134)
+++ /trunk/Mars/mcore/izstream.h	(revision 17135)
@@ -2,8 +2,12 @@
 #define MARS_izstream
 
-#include <string.h>
-
 #include <istream>
 #include <streambuf>
+
+#ifdef __MARS__
+#ifndef ROOT_TObject
+#include <TObject.h> // Needed for ClassDef
+#endif
+#endif
 
 #ifdef __CINT__
@@ -166,4 +170,8 @@
         return seekoff(pos, std::ios::beg);
     }
+
+#ifdef __MARS__
+    ClassDef(izstream, 0) // A C++ wrapper to istream zlib files
+#endif
 };