diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c
index 6d310258cafd3c30ea25b665abff930495869c38..f8e68b9db84ee3c9d30c449aac03704d2ad8397d 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -53,7 +53,7 @@ static int mthca_query_device(struct ib_device *ibdev,
 	if (!in_mad || !out_mad)
 		goto out;
 
-	memset(props, 0, sizeof props);
+	memset(props, 0, sizeof *props);
 
 	props->fw_ver              = mdev->fw_ver;