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-rw-r--r--include/regex.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/regex.h b/include/regex.h
index 2c49a41..21a7d30 100644
--- a/include/regex.h
+++ b/include/regex.h
@@ -75,6 +75,7 @@ typedef struct {
#define REG_DUMP 0200
/* regerror() flags */
+#define REG_ENOSYS -1 /* Reserved */
#define REG_NOMATCH 1
#define REG_BADPAT 2
#define REG_ECOLLATE 3
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