diff --git a/fs/fifo.c b/fs/fifo.c
index 6e7df72..9785e36 100644
--- a/fs/fifo.c
+++ b/fs/fifo.c
@@ -12,6 +12,7 @@
 #include <linux/mm.h>
 #include <linux/slab.h>
 #include <linux/fs.h>
+#include <linux/sched.h>
 #include <linux/pipe_fs_i.h>
 
 static void wait_for_partner(struct inode* inode, unsigned int *cnt)