diff --git a/dbus/dbus-sysdeps-win.c b/dbus/dbus-sysdeps-win.c
index 70200e7f..c1eb073e 100644
--- a/dbus/dbus-sysdeps-win.c
+++ b/dbus/dbus-sysdeps-win.c
@@ -2659,7 +2659,7 @@ static void dump_backtrace_for_thread (HANDLE hThread)
             DPRINTF ("%3d %s", i++, pSymbol->Name);
         }
       else
-        DPRINTF ("%3d 0x%lx", i++, sf.AddrPC.Offset);
+        DPRINTF ("%3d 0x%Ix", i++, sf.AddrPC.Offset);
 
       line.SizeOfStruct = sizeof(IMAGEHLP_LINE);
       if (SymGetLineFromAddr (GetCurrentProcess (), sf.AddrPC.Offset, &dwDisplacement, &line))