diff --git a/drivers/dahdi/zaphfc.c b/drivers/dahdi/zaphfc.c
index 0402b90..eb56f88 100644
--- a/drivers/dahdi/zaphfc.c
+++ b/drivers/dahdi/zaphfc.c
@@ -26,6 +26,7 @@
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
+#include <linux/sched.h>
 #include <dahdi/kernel.h>
 #include "zaphfc.h"
 
