--- truecrypt-4.2a/Linux/Kernel/Dm-target.c	2006-06-28 12:36:28.000000000 +0200
+++ truecrypt-4.2a_fixed/Linux/Kernel/Dm-target.c	2006-07-14 19:02:40.000000000 +0200
@@ -26,6 +26,10 @@
 #error Linux kernel 2.6.5 or later required
 #endif
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
+#define DM_MSG_PREFIX "truecrypt"
+#endif
+
 int trace_level = 0;
 
 #define MSG_PREFIX "truecrypt: "