diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
index 214898578026..6253e98d810c 100644
--- a/drivers/iommu/mtk_iommu.h
+++ b/drivers/iommu/mtk_iommu.h
@@ -15,6 +15,7 @@
 #include <linux/iommu.h>
 #include <linux/list.h>
 #include <linux/spinlock.h>
+#include <linux/dma-mapping.h>
 #include <soc/mediatek/smi.h>
 
 #define MTK_LARB_COM_MAX	8