diff --git a/ompi/mca/osc/portals4/osc_portals4_comm.c b/ompi/mca/osc/portals4/osc_portals4_comm.c
index 4978435c2b..5e2d677db4 100644
--- a/ompi/mca/osc/portals4/osc_portals4_comm.c
+++ b/ompi/mca/osc/portals4/osc_portals4_comm.c
@@ -473,6 +473,11 @@ ompi_osc_portals4_rget_accumulate(const void *origin_addr,
                 OMPI_OSC_PORTALS4_REQUEST_RETURN(request);
                 return ret;
             }
+            ret = ompi_osc_portals4_get_dt(origin_dt, &ptl_dt);
+            if (OMPI_SUCCESS != ret) {
+                OMPI_OSC_PORTALS4_REQUEST_RETURN(request);
+                return ret;
+            }
             length *= origin_count;
 
             result_md_offset = (ptl_size_t) result_addr;
@@ -835,6 +840,10 @@ ompi_osc_portals4_get_accumulate(const void *origin_addr,
             if (OMPI_SUCCESS != ret) {
                 return ret;
             }
+            ret = ompi_osc_portals4_get_dt(origin_dt, &ptl_dt);
+            if (OMPI_SUCCESS != ret) {
+                return ret;
+            }
             length *= origin_count;
 
             result_md_offset = (ptl_size_t) result_addr;