diff --git a/drivers/mfd/rtsx_pcr.c b/drivers/mfd/rtsx_pcr.c
index 56d4377c62c2b5b4e62bb6e51f24163ff4765629..3a44efa292036df17261bf7b2c95f35522d9f651 100644
--- a/drivers/mfd/rtsx_pcr.c
+++ b/drivers/mfd/rtsx_pcr.c
@@ -22,6 +22,7 @@
 
 #include <linux/pci.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/dma-mapping.h>
 #include <linux/highmem.h>
 #include <linux/interrupt.h>