6 files changed, 3 insertions, 6 deletions
diff --git a/xwayland/selection/dnd.c b/xwayland/selection/dnd.c
index 4c687172..534d056c 100644
--- a/xwayland/selection/dnd.c
+++ b/xwayland/selection/dnd.c
@@ -1,4 +1,3 @@
-#define _XOPEN_SOURCE 700
 #include <assert.h>
 #include <fcntl.h>
 #include <stdlib.h>
diff --git a/xwayland/selection/incoming.c b/xwayland/selection/incoming.c
index 4e88bbe4..5b253b5d 100644
--- a/xwayland/selection/incoming.c
+++ b/xwayland/selection/incoming.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 700
+#define _POSIX_C_SOURCE 200809L
 #include <assert.h>
 #include <fcntl.h>
 #include <stdlib.h>
diff --git a/xwayland/selection/outgoing.c b/xwayland/selection/outgoing.c
index 156f0ad5..0c095d25 100644
--- a/xwayland/selection/outgoing.c
+++ b/xwayland/selection/outgoing.c
@@ -1,4 +1,3 @@
-#define _XOPEN_SOURCE 700
 #include <assert.h>
 #include <fcntl.h>
 #include <stdlib.h>
diff --git a/xwayland/selection/selection.c b/xwayland/selection/selection.c
index e16ad111..d9de5643 100644
--- a/xwayland/selection/selection.c
+++ b/xwayland/selection/selection.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 700
+#define _POSIX_C_SOURCE 200809L
 #include <assert.h>
 #include <fcntl.h>
 #include <stdlib.h>
diff --git a/xwayland/sockets.c b/xwayland/sockets.c
index 2b0b5ced..112a8bb0 100644
--- a/xwayland/sockets.c
+++ b/xwayland/sockets.c
@@ -1,4 +1,4 @@
-#define _XOPEN_SOURCE 700
+#define _POSIX_C_SOURCE 200809L
 #ifdef __FreeBSD__
 // for SOCK_CLOEXEC
 #define __BSD_VISIBLE 1
diff --git a/xwayland/xwayland.c b/xwayland/xwayland.c
index d92d58fb..e6d3502c 100644
--- a/xwayland/xwayland.c
+++ b/xwayland/xwayland.c
@@ -1,4 +1,3 @@
-#define _XOPEN_SOURCE 700
 #define _DEFAULT_SOURCE
 #ifdef __FreeBSD__
 // for SOCK_CLOEXEC