diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index 77d0321..03852d7 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -31,6 +31,7 @@ enum {
 	ND_MAX_LANES = 256,
 	SECTOR_SHIFT = 9,
 	INT_LBASIZE_ALIGNMENT = 64,
+	NVDIMM_IO_ATOMIC = 1,
 };
 
 struct nd_poison {