Index: lex.l
--- lex.l.orig
+++ lex.l
@@ -37,6 +37,7 @@
  ***********************************************************************/
 
 /* #include <stdio.h> */		/* lex already includes stdio.h */
+#include "twm.h"
 #include "gram.h"
 #include "list.h"
 #include "parse.h"
@@ -44,7 +45,7 @@ extern char *ProgramName;
 
 extern int ParseError;
 
-yywrap() { return(1);}
+int yywrap() { return(1);}
 
 #define YY_INPUT(buf,result,max_size) \
     { \