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-rw-r--r--libc/misc/regex/regex_old.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libc/misc/regex/regex_old.c b/libc/misc/regex/regex_old.c
index 7a9c4d7e0..b79b41aa3 100644
--- a/libc/misc/regex/regex_old.c
+++ b/libc/misc/regex/regex_old.c
@@ -35,6 +35,7 @@
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
+#include <unistd.h>
#include <malloc.h>
#include <stdio.h>