diff --git a/debug.h b/debug.h
new file mode 100644
index 0000000..6f1c8f9
--- /dev/null
+++ b/debug.h
@@ -0,0 +1,77 @@
+/*
+   $Source$
+   $Revision$
+
+   Copyright (C) 2000 by CyberSolutions GmbH, Germany.
+
+   This file is part of OpenPetidomo.
+
+   OpenPetidomo is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   OpenPetidomo is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+   General Public License for more details.
+*/
+
+#ifndef __DEBUG_H__
+#define __DEBUG_H__ 1
+
+/********** Known debug modules. **********/
+
+enum {
+    DEBUG_MAIN,
+    DEBUG_COMMAND,
+    DEBUG_LISTSERV,
+    DEBUG_HERMES,
+    DEBUG_CONFIG,
+    DEBUG_RFCPARSE,
+    DEBUG_MAILER,
+    DEBUG_ACL,
+    DEBUG_AUTHEN,
+    DEBUG_FILTER,
+    DEBUG_ARCHIVE,
+    DEBUG_EOL
+};
+
+#define MODULE_TABLE const char * const ModuleTable[] = { \
+    "main", \
+    "command", \
+    "listserv", \
+    "hermes", \
+    "config", \
+    "rfcparse", \
+    "mailer", \
+    "acl", \
+    "authen", \
+    "filter", \
+    "archive", \
+     NULL };
+
+/********** Prototypes **********/
+
+#ifdef DEBUG
+#  ifdef __cplusplus
+      extern "C" {
+#  endif
+extern char * debug_fname;
+void setDebugLevel(unsigned short, unsigned short);
+unsigned short getDebugLevel(unsigned short);
+void _debug(unsigned short, unsigned short, const char *, ...);
+#  ifdef __cplusplus
+      }
+#  endif
+#  ifdef __GNUC__
+#     define debug(x) { debug_fname = __FUNCTION__; _debug x; }
+#  else
+#     define debug(x) { debug_fname = "unknown"; _debug x; }
+#  endif
+#else
+#  define setDebugLevel(a,b) ;
+#  define debug(x) ;
+#endif
+
+#endif /* !__DEBUG_H__ */