diff --git a/doc/flex.texi b/doc/flex.texi
index 6eaf53eac..00d24011c 100755
--- a/doc/flex.texi
+++ b/doc/flex.texi
@@ -4561,7 +4561,7 @@ void scan_file( char* filename )
     in = fopen( filename, "r" );
     stat( filename, &buf );
 
-    yylex_init_extra( buf, &scanner );
+    yylex_init_extra( &buf, &scanner );
     yyset_in( in, scanner );
     yylex( scanner );
     yylex_destroy( scanner );