diff -u -r ../strace-4.11/flock.h ./flock.h
--- ../strace-4.11/flock.h	2015-12-17 12:56:48.000000000 -0500
+++ ./flock.h	2016-01-03 20:51:51.276893007 -0500
@@ -26,6 +26,7 @@
  */
 
 #include <linux/fcntl.h>
+#include <fcntl.h>
 
 #if defined HAVE_STRUCT_FLOCK
 typedef struct flock struct_kernel_flock;