diff --git a/include/types.h b/include/types.h
index 36d5a8f18..ef2a2ef8b 100644
--- a/include/types.h
+++ b/include/types.h
@@ -204,4 +204,16 @@ enum kcmp_type {
 # define SCM_MAX_FD	253
 #endif
 
+#include <fcntl.h>
+
+#ifndef F_SETOWN_EX
+#define F_SETOWN_EX	15
+#define F_GETOWN_EX	16
+
+struct f_owner_ex {
+	int	type;
+	pid_t	pid;
+};
+#endif
+
 #endif /* CR_TYPES_H_ */
diff --git a/rbtree.c b/rbtree.c
index 5a60757b1..df6d6f090 100644
--- a/rbtree.c
+++ b/rbtree.c
@@ -2,6 +2,7 @@
  * RBtree implementation adopted from the Linux kernel sources.
  */
 
+#include <sys/types.h>
 #include "rbtree.h"
 
 static void __rb_rotate_left(struct rb_node *node, struct rb_root *root)