diff --git a/include/common/accept4.h b/include/common/accept4.h
new file mode 100644
index 0000000..9c81b80
--- /dev/null
+++ b/include/common/accept4.h
@@ -0,0 +1,72 @@
+/*
+ * include/common/accept4.h
+ * Definition of the accept4 system call for older Linux libc.
+ *
+ * Copyright 2000-2012 Willy Tarreau <w@1wt.eu>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation, version 2.1
+ * exclusively.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#ifndef _COMMON_ACCEPT4_H
+#define _COMMON_ACCEPT4_H
+
+#if defined (__linux__) && defined(USE_ACCEPT4)
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/syscall.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <common/syscall.h>
+
+/* On recent Linux kernels, the accept4() syscall may be used to avoid an fcntl()
+ * call to set O_NONBLOCK on the resulting socket. It was introduced in Linux
+ * 2.6.28 and is not present in older libcs.
+ */
+#ifndef SOCK_NONBLOCK
+#define SOCK_NONBLOCK O_NONBLOCK
+#endif
+
+#if defined(USE_MY_ACCEPT4) || !defined(SYS_ACCEPT4)
+#if defined(CONFIG_HAP_LINUX_VSYSCALL) && defined(__linux__) && defined(__i386__)
+/* The syscall is redefined somewhere else */
+extern int accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags);
+#elif ACCEPT4_USE_SOCKETCALL
+static int accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags)
+{
+	unsigned long args[4];
+	static _syscall2(int, socketcall, int, call, unsigned long *, args);
+
+	args[0] = (unsigned long)sockfd;
+	args[1] = (unsigned long)addr;
+	args[2] = (unsigned long)addrlen;
+	args[3] = (unsigned long)flags;
+	return socketcall(SYS_ACCEPT4, args);
+}
+#else
+static _syscall4(int, accept4, int, sockfd, struct sockaddr *, addr, socklen_t *, addrlen, int, flags);
+#endif /* VSYSCALL etc... */
+#endif /* USE_MY_ACCEPT4 */
+#endif /* __linux__ && USE_ACCEPT4 */
+#endif /* _COMMON_ACCEPT4_H */
+
+/*
+ * Local variables:
+ *  c-indent-level: 8
+ *  c-basic-offset: 8
+ * End:
+ */