diff --git a/ompi/mca/btl/pcie/btl_pcie.c b/ompi/mca/btl/pcie/btl_pcie.c
index 07b178ceb2..8042a9aaae 100644
--- a/ompi/mca/btl/pcie/btl_pcie.c
+++ b/ompi/mca/btl/pcie/btl_pcie.c
@@ -360,7 +360,7 @@ mca_btl_base_descriptor_t* mca_btl_pcie_prepare_dst(
     if(NULL == frag) { 
         return NULL;
     }
-    ompi_datatype_type_lb(convertor->pDesc, &lb);
+    ompi_datatype_type_lb((ompi_datatype_t*)convertor->pDesc, &lb);
     frag->segment.seg_addr.pval = convertor->pBaseBuf + lb +
         convertor->bConverted;
     if(NULL == registration) { 
diff --git a/ompi/mca/btl/sctp/btl_sctp.c b/ompi/mca/btl/sctp/btl_sctp.c
index 6ce5ad8b88..cdf93c9b56 100644
--- a/ompi/mca/btl/sctp/btl_sctp.c
+++ b/ompi/mca/btl/sctp/btl_sctp.c
@@ -336,7 +336,7 @@ mca_btl_base_descriptor_t* mca_btl_sctp_prepare_dst(
         return NULL;
     }
 
-    opal_datatype_type_lb(convertor->pDesc, &lb);
+    ompi_datatype_type_lb((ompi_datatype_t*)convertor->pDesc, &lb);
     frag->segments->seg_len = *size;
     frag->segments->seg_addr.pval = convertor->pBaseBuf + lb + convertor->bConverted;