diff --git a/Include/errcode.h b/Include/errcode.h
index 6bb3cc1..5946686 100644
--- a/Include/errcode.h
+++ b/Include/errcode.h
@@ -30,6 +30,7 @@
 #define E_EOLS		24	/* EOL in single-quoted string */
 #define E_LINECONT	25	/* Unexpected characters after a line continuation */
 #define E_IDENTIFIER    26      /* Invalid characters in identifier */
+#define E_BADSINGLE	27	/* Ill-formed single statement input */
 
 #ifdef __cplusplus
 }