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-rw-r--r--common/stringop.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/common/stringop.c b/common/stringop.c
index d2c91c24..df016e9d 100644
--- a/common/stringop.c
+++ b/common/stringop.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 700
+#define _POSIX_C_SOURCE 200809L
#include <stdlib.h>
#include <stdio.h>
#include <string.h>