diff --git a/arch/sh/drivers/pci/pcie-sh7786.c b/arch/sh/drivers/pci/pcie-sh7786.c
index 4f79fd9059e0..c1e862af9b63 100644
--- a/arch/sh/drivers/pci/pcie-sh7786.c
+++ b/arch/sh/drivers/pci/pcie-sh7786.c
@@ -82,6 +82,7 @@ static struct resource sh7786_pci2_resources[] = {
 		.name	= "PCIe2 IO",
 		.start	= 0xfc800000,
 		.end	= 0xfc800000 + SZ_4M - 1,
+		.flags	= IORESOURCE_IO,
 	}, {
 		.name	= "PCIe2 MEM 0",
 		.start	= 0x80000000,