diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 519eff362c1caa14e932836816a020ed0f84ed4d..61837890c13296716d02a98de47d70a72e4a388c 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -212,6 +212,7 @@ struct vfio_device_info {
 #define VFIO_DEVICE_API_PCI_STRING		"vfio-pci"
 #define VFIO_DEVICE_API_PLATFORM_STRING		"vfio-platform"
 #define VFIO_DEVICE_API_AMBA_STRING		"vfio-amba"
+#define VFIO_DEVICE_API_CCW_STRING		"vfio-ccw"
 
 /**
  * VFIO_DEVICE_GET_REGION_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 8,