diff --git a/xwayland/xwayland.c b/xwayland/xwayland.c
index e6d3502c..e6f15735 100644
--- a/xwayland/xwayland.c
+++ b/xwayland/xwayland.c
@@ -1,4 +1,4 @@
-#define _DEFAULT_SOURCE
+#define _POSIX_C_SOURCE 200112L
 #ifdef __FreeBSD__
 // for SOCK_CLOEXEC
 #define __BSD_VISIBLE 1
@@ -21,14 +21,6 @@
 #include "util/signal.h"
 #include "xwayland/xwm.h"
 
-#ifdef __FreeBSD__
-static inline int clearenv(void) {
-	extern char **environ;
-	environ[0] = NULL;
-	return 0;
-}
-#endif
-
 struct wlr_xwayland_cursor {
 	uint8_t *pixels;
 	uint32_t stride;
@@ -102,17 +94,6 @@ static void exec_xwayland(struct wlr_xwayland *wlr_xwayland) {
 		_exit(EXIT_FAILURE);
 	}
 
-	const char *xdg_runtime = getenv("XDG_RUNTIME_DIR");
-	const char *path_var = getenv("PATH");
-	if (clearenv() != 0) {
-		wlr_log_errno(WLR_ERROR, "clearenv failed");
-		_exit(EXIT_FAILURE);
-	}
-	if (xdg_runtime != NULL) {
-		setenv("XDG_RUNTIME_DIR", xdg_runtime, true);
-	}
-	setenv("PATH", path_var, true);
-
 	char wayland_socket_str[16];
 	snprintf(wayland_socket_str, sizeof(wayland_socket_str), "%d", wlr_xwayland->wl_fd[1]);
 	setenv("WAYLAND_SOCKET", wayland_socket_str, true);