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-rw-r--r--lib/libc/regex/regcomp.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/libc/regex/regcomp.c b/lib/libc/regex/regcomp.c
index f34dc322d0bb..aebea2b02435 100644
--- a/lib/libc/regex/regcomp.c
+++ b/lib/libc/regex/regcomp.c
@@ -1183,6 +1183,7 @@ p_b_pseudoclass(struct parse *p, char c) {
/* PASSTHROUGH */
case 'w':
p_b_cclass_named(p, cs, "alnum");
+ CHadd(p, cs, '_');
break;
case 'S':
cs->invert = 1;