diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c
index bd968a43a48b29047fa5f2d9d8cd1fe9ceb66b69..62c47bb765178a10fe3aa371ef0c7d5d0c0c6364 100644
--- a/arch/powerpc/sysdev/dart_iommu.c
+++ b/arch/powerpc/sysdev/dart_iommu.c
@@ -292,6 +292,7 @@ static void iommu_table_dart_setup(void)
 	iommu_table_dart.it_offset = 0;
 	/* it_size is in number of entries */
 	iommu_table_dart.it_size = dart_tablesize / sizeof(u32);
+	iommu_table_dart.it_page_shift = IOMMU_PAGE_SHIFT_4K;
 
 	/* Initialize the common IOMMU code */
 	iommu_table_dart.it_base = (unsigned long)dart_vbase;