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diff --git a/engines/glk/alan2/glkstart.h b/engines/glk/alan2/glkstart.h
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+++ b/engines/glk/alan2/glkstart.h
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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef GLK_ALAN2_GLK_START
+#define GLK_ALAN2_GLK_START
+
+/* This header defines an interface that must be used by program linked
+    with the various Unix Glk libraries -- at least, the three I wrote.
+    (I encourage anyone writing a Unix Glk library to use this interface,
+    but it's not part of the Glk spec.)
+    
+    Because Glk is *almost* perfectly portable, this interface *almost*
+    doesn't have to exist. In practice, it's small.
+*/
+
+namespace Glk {
+namespace Alan2 {
+
+#define glkunix_arg_End (0)
+#define glkunix_arg_ValueFollows (1)
+#define glkunix_arg_NoValue (2)
+#define glkunix_arg_ValueCanFollow (3)
+#define glkunix_arg_NumberValue (4)
+
+typedef struct glkunix_argumentlist_struct {
+    char *name;
+    int argtype;
+    char *desc;
+} glkunix_argumentlist_t;
+
+typedef struct glkunix_startup_struct {
+    int argc;
+    char **argv;
+} glkunix_startup_t;
+
+/* The list of command-line arguments; this should be defined in your code. */
+extern glkunix_argumentlist_t glkunix_arguments[];
+
+/* The external function; this should be defined in your code. */
+extern bool glkunix_startup_code(glkunix_startup_t *data);
+
+/* Some helpful utility functions which the library makes available
+   to your code. Obviously, this is nonportable; so you should
+   only call it from glkunix_startup_code().
+*/
+extern strid_t glkunix_stream_open_pathname(char *pathname, uint textmode, uint rock);
+
+} // End of namespace Alan2
+} // End of namespace Glk
+
+#endif