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-rw-r--r--src/legacy/utmpx.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/legacy/utmpx.c b/src/legacy/utmpx.c
index e2843c94..fa69f387 100644
--- a/src/legacy/utmpx.c
+++ b/src/legacy/utmpx.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE
#include <utmpx.h>
#include <stddef.h>
#include <errno.h>