diff --git a/src/mca/ptl/ib/src/ptl_ib.c b/src/mca/ptl/ib/src/ptl_ib.c
index 07b9ff3310..7e576b2d41 100644
--- a/src/mca/ptl/ib/src/ptl_ib.c
+++ b/src/mca/ptl/ib/src/ptl_ib.c
@@ -322,14 +322,14 @@ static void mca_ptl_ib_start_ack(mca_ptl_base_module_t *module,
 
     /* Amount of data we have already received */
     recv_len = 
-        recv_frag->super.frag_base.frag_header.hdr_frag.hdr_frag_length;
+        recv_frag->super.frag_base.frag_header.hdr_rndv.hdr_frag_length;
 
     hdr->hdr_common.hdr_type = MCA_PTL_HDR_TYPE_ACK;
     hdr->hdr_common.hdr_flags = 0;
 
     /* Remote side send descriptor */
     hdr->hdr_ack.hdr_src_ptr =
-        recv_frag->super.frag_base.frag_header.hdr_frag.hdr_src_ptr;
+        recv_frag->super.frag_base.frag_header.hdr_rndv.hdr_src_ptr;
 
     /* Matched request from recv side */
     hdr->hdr_ack.hdr_dst_match.lval = 0;
diff --git a/src/mca/ptl/ib/src/ptl_ib_recvfrag.c b/src/mca/ptl/ib/src/ptl_ib_recvfrag.c
index a9c9dded7b..9e497f90a1 100644
--- a/src/mca/ptl/ib/src/ptl_ib_recvfrag.c
+++ b/src/mca/ptl/ib/src/ptl_ib_recvfrag.c
@@ -71,6 +71,7 @@ static void mca_ptl_ib_data_frag(mca_ptl_base_module_t *module,
     int rc;
     ompi_list_item_t *item;
     mca_ptl_ib_recv_frag_t *recv_frag;
+    mca_ptl_base_rendezvous_header_t *rendezvous_hdr = (mca_ptl_base_rendezvous_header_t *)header;
 
     OMPI_FREE_LIST_GET(&mca_ptl_ib_component.ib_recv_frags,
             item, rc);
@@ -97,7 +98,7 @@ static void mca_ptl_ib_data_frag(mca_ptl_base_module_t *module,
      * default */
     recv_frag->super.frag_base.frag_addr =
         (char *) header + sizeof (mca_ptl_base_header_t);
-    recv_frag->super.frag_base.frag_size = header->hdr_frag.hdr_frag_length;
+    recv_frag->super.frag_base.frag_size = header->hdr_rndv.hdr_frag_length;
 
     /* match with preposted
      * requests */
@@ -112,7 +113,7 @@ static void mca_ptl_ib_data_frag(mca_ptl_base_module_t *module,
         /* ompi_output(0, "Can't match buffer. Mama is unhappy\n"); */
         memcpy (recv_frag->unex_buf,
                 (char *) header + sizeof (mca_ptl_base_header_t),
-                header->hdr_frag.hdr_frag_length);
+                header->hdr_rndv.hdr_frag_length);
         recv_frag->super.frag_is_buffered = true; 
         recv_frag->super.frag_base.frag_addr = recv_frag->unex_buf;
 
diff --git a/src/mca/ptl/ib/src/ptl_ib_sendfrag.c b/src/mca/ptl/ib/src/ptl_ib_sendfrag.c
index eeacc78058..f49c73bf7a 100644
--- a/src/mca/ptl/ib/src/ptl_ib_sendfrag.c
+++ b/src/mca/ptl/ib/src/ptl_ib_sendfrag.c
@@ -56,24 +56,22 @@ int mca_ptl_ib_send_frag_init(mca_ptl_ib_send_frag_t* sendfrag,
 {
     size_t size_in = *size;
     size_t size_out;
-    mca_ptl_base_header_t *hdr;
+    mca_ptl_base_rendezvous_header_t *hdr;
     struct iovec iov;
     int header_length;
 
     /* Start of the IB buffer */
-    hdr = (mca_ptl_base_header_t *) &sendfrag->ib_buf.buf[0];
+    hdr = (mca_ptl_base_rendezvous_header_t *) &sendfrag->ib_buf.buf[0];
 
     /* Fill up the header for PML to make a match */
     if(offset == 0) { 
-        hdr->hdr_common.hdr_type = MCA_PTL_HDR_TYPE_MATCH;
-        hdr->hdr_common.hdr_flags = flags;
-        hdr->hdr_frag.hdr_frag_offset = offset; 
-        hdr->hdr_frag.hdr_src_ptr.lval = 0; /* for VALGRIND/PURIFY - REPLACE WITH MACRO */
+        hdr->hdr_match.hdr_common.hdr_type = MCA_PTL_HDR_TYPE_MATCH;
+        hdr->hdr_match.hdr_common.hdr_flags = flags;
+        hdr->hdr_src_ptr.lval = 0; /* for VALGRIND/PURIFY - REPLACE WITH MACRO */
 
         /* Ptr to send frag, so incoming ACK can locate the frag */
-        hdr->hdr_frag.hdr_src_ptr.pval = sendfrag;
+        hdr->hdr_src_ptr.pval = sendfrag;
 
-        hdr->hdr_frag.hdr_dst_ptr.lval = 0;
         hdr->hdr_match.hdr_contextid = sendreq->req_base.req_comm->c_contextid;
         hdr->hdr_match.hdr_src = sendreq->req_base.req_comm->c_my_rank;
         hdr->hdr_match.hdr_dst = sendreq->req_base.req_peer;
@@ -81,18 +79,16 @@ int mca_ptl_ib_send_frag_init(mca_ptl_ib_send_frag_t* sendfrag,
         hdr->hdr_match.hdr_msg_length = sendreq->req_bytes_packed;
         hdr->hdr_match.hdr_msg_seq = sendreq->req_base.req_sequence;
 
-        header_length = sizeof(mca_ptl_base_match_header_t);
+        header_length = sizeof(mca_ptl_base_rendezvous_header_t);
 
     } else {
 
-        hdr->hdr_common.hdr_type = MCA_PTL_HDR_TYPE_FRAG;
-        hdr->hdr_common.hdr_flags = flags;
-        hdr->hdr_frag.hdr_frag_offset = offset; 
-        hdr->hdr_frag.hdr_src_ptr.lval = 0; /* for VALGRIND/PURIFY - REPLACE WITH MACRO */
-        hdr->hdr_frag.hdr_src_ptr.pval = sendfrag;
-        hdr->hdr_frag.hdr_dst_ptr = sendreq->req_peer_match;
+        hdr->hdr_match.hdr_common.hdr_type = MCA_PTL_HDR_TYPE_FRAG;
+        hdr->hdr_match.hdr_common.hdr_flags = flags;
+        hdr->hdr_src_ptr.lval = 0; /* for VALGRIND/PURIFY - REPLACE WITH MACRO */
+        hdr->hdr_src_ptr.pval = sendfrag;
 
-        header_length = sizeof(mca_ptl_base_frag_header_t);
+        header_length = sizeof(mca_ptl_base_rendezvous_header_t);
     }
 
     /* initialize convertor */
@@ -148,7 +144,7 @@ int mca_ptl_ib_send_frag_init(mca_ptl_ib_send_frag_t* sendfrag,
                (header_length + size_in));
     }
 
-    hdr->hdr_frag.hdr_frag_length = size_out;
+    hdr->hdr_frag_length = size_out;
 
     /* fragment state */
     sendfrag->frag_send.frag_base.frag_owner =