diff --git a/drivers/net/r6040.c b/drivers/net/r6040.c
index 858b191..504a48f 100644
--- a/drivers/net/r6040.c
+++ b/drivers/net/r6040.c
@@ -273,7 +273,7 @@
 	dma_addr_t mapping = desc_dma;
 
 	while (size-- > 0) {
-		mapping += sizeof(sizeof(*desc));
+		mapping += sizeof(*desc);
 		desc->ndesc = cpu_to_le32(mapping);
 		desc->vndescp = desc + 1;
 		desc++;