--- rats/tokens.h
+++ rats/tokens.h
@@ -93,7 +93,6 @@ extern int	clex_column;
 extern int      clex_lineno;
 extern FILE *   yycin;
 extern char *   yyctext;
-extern int      yycleng;
 extern int      yyclength, yycsize;
 extern char *   yyccomment;
 
@@ -104,7 +103,6 @@ extern int 	plex_column;
 extern int      plex_lineno;
 extern FILE *   yypin;
 extern char *   yyptext;
-extern int      yypleng;
 extern char *   yypcomment;
 
 extern int yyplex(void);
@@ -114,7 +112,6 @@ extern int 	perllex_column;
 extern int 	perllex_lineno;
 extern FILE *	yyperlin;
 extern char *	yyperltext;
-extern int	yyperlleng;
 extern char *	yyperlcomment;
 extern int yyperllex(void);
 
@@ -123,7 +120,6 @@ extern int 	phplex_column;
 extern int      phplex_lineno;
 extern FILE *   yyphpin;
 extern char *   yyphptext;
-extern int      yyphpleng;
 extern char *   yyphpcomment;
 extern int yyphplex(void);
 
@@ -132,7 +128,6 @@ extern int 	rubylex_column;
 extern int      rubylex_lineno;
 extern FILE *   yyrubyin;
 extern char *   yyrubytext;
-extern int      yyrubyleng;
 extern char *   yyrubycomment;
 extern int yyrubylex(void);;