diff --git a/undump.h b/undump.h
new file mode 100644
index 00000000..ce418692
--- /dev/null
+++ b/undump.h
@@ -0,0 +1,26 @@
+/*
+** undump.h
+** definitions for lua decompiler
+** $Id$
+*/
+
+#include "inout.h"
+#include "mem.h"
+#include "opcode.h"
+#include "table.h"
+
+#define IsMain(f)	(f->lineDefined==0)
+
+/* definitions for chunk headers */
+
+#define ID_CHUNK	27		/* ESC */
+#define ID_FUN		'F'
+#define ID_VAR		'V'
+#define ID_STR		'S'
+#define	SIGNATURE	"Lua"
+#define	VERSION		0x23		/* 2.3 */
+#define	TEST_WORD	0x1234		/* a word for testing byte ordering */
+#define	TEST_FLOAT	0.123456789e-23	/* a float for testing representation */
+
+TFunc* luaI_undump1(FILE* D);		/* load one chunk */
+void luaI_undump(FILE* D);		/* load all chunks */