diff --git a/sys/ofed/drivers/infiniband/core/ib_mad.c b/sys/ofed/drivers/infiniband/core/ib_mad.c
index 5b1297fe4cd3..82a3f19d92bb 100644
--- a/sys/ofed/drivers/infiniband/core/ib_mad.c
+++ b/sys/ofed/drivers/infiniband/core/ib_mad.c
@@ -1554,8 +1554,11 @@ static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req,
 			method = &(*vendor_table)->vendor_class[
 				vclass]->method_table[i];
 			/* Allocate method table for this OUI */
-			if ((ret = allocate_method_table(method)))
-				goto error3;
+			if (!*method) {
+				ret = allocate_method_table(method);
+				if (ret)
+					goto error3;
+			}
 			memcpy((*vendor_table)->vendor_class[vclass]->oui[i],
 			       mad_reg_req->oui, 3);
 			goto check_in_use;