diff --git a/src/vim.h b/src/vim.h
index a51834f..a1a9708 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -815,6 +815,7 @@
 #define EW_EXEC		0x40	/* executable files */
 #define EW_PATH		0x80	/* search in 'path' too */
 #define EW_ICASE	0x100	/* ignore case */
+#define EW_NOERROR	0x200	/* no error for bad regexp */
 /* Note: mostly EW_NOTFOUND and EW_SILENT are mutually exclusive: EW_NOTFOUND
  * is used when executing commands and EW_SILENT for interactive expanding. */