diff --git a/drivers/ptp/ptp_pch.c b/drivers/ptp/ptp_pch.c
index 375eb04c16ea4833d0858c0497b784ea475cbf37..6fff680204885a3653464bc5369495bef2a97fd7 100644
--- a/drivers/ptp/ptp_pch.c
+++ b/drivers/ptp/ptp_pch.c
@@ -30,6 +30,7 @@
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/ptp_clock_kernel.h>
+#include <linux/slab.h>
 
 #define STATION_ADDR_LEN	20
 #define PCI_DEVICE_ID_PCH_1588	0x8819