1 files changed, 2 insertions, 0 deletions
diff --git a/parser.h b/parser.h
index 9a61a52164..89d1c6cdaf 100644
--- a/parser.h
+++ b/parser.h
@@ -9,6 +9,8 @@
  * and lexer (perly.c, toke,c).
  */
 
+#define YYEMPTY		(-2)
+
 typedef struct {
     YYSTYPE val;    /* semantic value */
     short   state;