diff --git a/rdma/ibverbs.pyx b/rdma/ibverbs.pyx
index 16891a6..59bddf0 100644
--- a/rdma/ibverbs.pyx
+++ b/rdma/ibverbs.pyx
@@ -108,7 +108,7 @@ cdef to_ah_attr(c.ibv_ah_attr *cattr, object attr):
raise TypeError("attr.grh must be a global_route")
if not isinstance(attr.grh.dgid, IBA.GID):
raise TypeError("attr.grh.dgid must be an IBA.GID")
- tmp = <uint8_t *>PyString_AsString(attr.DGID);
+ tmp = <uint8_t *>PyString_AsString(attr.grh.dgid);
for 0 <= i < 16:
cattr.grh.dgid.raw[i] = tmp[i];
cattr.grh.flow_label = attr.grh.flow_label
@@ -466,6 +466,22 @@ cdef class Context:
active_speed = cattr.active_speed,
phys_state = cattr.phys_state)
