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-rw-r--r--util/libreboot-utils/mkhtemp.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/util/libreboot-utils/mkhtemp.c b/util/libreboot-utils/mkhtemp.c
index ced8aa96..c8ddb1b1 100644
--- a/util/libreboot-utils/mkhtemp.c
+++ b/util/libreboot-utils/mkhtemp.c
@@ -16,9 +16,9 @@
* while the specification that it implements evolves.
*/
-#if defined(__linux__) && !defined(_GNU_SOURCE)
+#if !defined(_POSIX_C_SOURCE)
/* for openat2 on linux */
-#define _GNU_SOURCE 1
+#define _POSIX_C_SOURCE 200809L
#endif
#include <sys/types.h>