Index: libcfa/src/concurrency/io.cfa
===================================================================
--- libcfa/src/concurrency/io.cfa	(revision 0a805f298d430b1aec64bae13335b7f65ed8138f)
+++ libcfa/src/concurrency/io.cfa	(revision 6136eccf63356d8d30ab7576b947ffdb2a27d19c)
@@ -542,4 +542,5 @@
 	#include <sys/types.h>
 	#include <sys/socket.h>
+	#include <sys/syscall.h>
 	struct iovec;
 	extern ssize_t preadv2 (int fd, const struct iovec *iov, int iovcnt, off_t offset, int flags);