1 files changed, 1 insertions, 0 deletions
diff --git a/regex.h b/regex.h
index de933278..f09435c5 100644
--- a/regex.h
+++ b/regex.h
@@ -196,6 +196,7 @@ extern reg_syntax_t re_syntax_options;
    | RE_NO_BK_PARENS              | RE_NO_BK_REFS			\
    | RE_NO_BK_VBAR                | RE_NO_EMPTY_RANGES			\
    | RE_DOT_NEWLINE		  | RE_CONTEXT_INDEP_ANCHORS		\
+   | RE_CHAR_CLASSES							\
    | RE_UNMATCHED_RIGHT_PAREN_ORD | RE_NO_GNU_OPS)
 
 #define RE_SYNTAX_GNU_AWK						\