--- /dev/null
+/*
+ * Copyright notice from original mutt:
+ * Copyright (C) 1997 Alain Penders <Alain@Finale-Dev.com>
+ *
+ * This file is part of mutt-ng, see http://www.muttng.org/.
+ * It's licensed under the GNU General Public License,
+ * please see the file GPL in the top level source directory.
+ */
+#ifndef _COMPRESS_H
+#define _COMPRESS_H
+
+#include "mx.h"
+
+int mutt_can_read_compressed (const char *);
+int mutt_can_append_compressed (const char *);
+int mutt_open_read_compressed (CONTEXT *);
+int mutt_open_append_compressed (CONTEXT *);
+int mutt_slow_close_compressed (CONTEXT *);
+int mutt_sync_compressed (CONTEXT *);
+int mutt_test_compress_command (const char *);
+int mutt_check_mailbox_compressed (CONTEXT *);
+void mutt_fast_close_compressed (CONTEXT *);
+
+extern mx_t const compress_mx;
+
+#endif /* _COMPRESS_H */