diff --git a/ompi/mca/osc/base/Makefile.am b/ompi/mca/osc/base/Makefile.am
index 1e065f72c95..311fbe0394e 100644
--- a/ompi/mca/osc/base/Makefile.am
+++ b/ompi/mca/osc/base/Makefile.am
@@ -7,6 +7,7 @@
 #                         University of Stuttgart.  All rights reserved.
 # Copyright (c) 2004-2005 The Regents of the University of California.
 #                         All rights reserved.
+# Copyright (c) 2017 IBM Corporation.  All rights reserved.
 # $COPYRIGHT$
 #
 # Additional copyrights may follow
@@ -14,6 +15,8 @@
 # $HEADER$
 #
 
+dist_ompidata_DATA = base/help-mca-osc-base.txt
+
 headers += \
         base/base.h \
 	base/osc_base_obj_convert.h
diff --git a/ompi/mca/osc/base/help-mca-osc-base.txt b/ompi/mca/osc/base/help-mca-osc-base.txt
new file mode 100644
index 00000000000..abe658fd625
--- /dev/null
+++ b/ompi/mca/osc/base/help-mca-osc-base.txt
@@ -0,0 +1,18 @@
+# -*- text -*-
+#
+# Copyright (c) 2017      IBM Corporation.  All rights reserved.
+# $COPYRIGHT$
+#
+# Additional copyrights may follow
+#
+# $HEADER$
+#
+# This is the US/English help file for Open MPI MCA osc-specific
+# error messages.
+#
+[unsupported-dt]
+Unsupported datatype and op combination used in a one-sided operation.
+
+ Datatype : %s
+ Operation: %s
+ Rank     : %d
diff --git a/ompi/mca/osc/base/osc_base_obj_convert.c b/ompi/mca/osc/base/osc_base_obj_convert.c
index b90873f6edb..9d3082c08f3 100644
--- a/ompi/mca/osc/base/osc_base_obj_convert.c
+++ b/ompi/mca/osc/base/osc_base_obj_convert.c
@@ -15,6 +15,7 @@
  *                         and Technology (RIST). All rights reserved.
  * Copyright (c) 2015      Cisco Systems, Inc.  All rights reserved.
  * Copyright (c) 2015      Intel, Inc. All rights reserved.
+ * Copyright (c) 2017      IBM Corporation.  All rights reserved.
  * $COPYRIGHT$
  *
  * Additional copyrights may follow
@@ -31,6 +32,7 @@
 #include "opal/datatype/opal_convertor.h"
 #include "opal/datatype/opal_convertor_internal.h"
 #include "opal/datatype/opal_datatype_prototypes.h"
+#include "opal/util/show_help.h"
 
 #include "ompi/op/op.h"
 #include "ompi/datatype/ompi_datatype.h"
@@ -76,6 +78,24 @@ int ompi_osc_base_process_op (void *outbuf, void *inbuf, size_t inbuflen,
         return OMPI_ERR_NOT_SUPPORTED;
     }
 
+    /* TODO: Remove the following check when support is added.
+     * See the following issue for the current state:
+     *   https://github.com/open-mpi/ompi/issues/1666
+     */
+    if(MPI_MINLOC == op || MPI_MAXLOC == op) {
+        if(MPI_SHORT_INT == datatype ||
+           MPI_DOUBLE_INT == datatype ||
+           MPI_LONG_INT == datatype ||
+           MPI_LONG_DOUBLE_INT == datatype) {
+           ompi_communicator_t *comm = &ompi_mpi_comm_world.comm;
+           opal_show_help("help-mca-osc-base.txt", "unsupported-dt", true,
+                          datatype->name,
+                          op->o_name,
+                          comm->c_my_rank);
+           ompi_mpi_abort(comm, -1);
+        }
+    }
+
     if (ompi_datatype_is_predefined(datatype)) {
         ompi_op_reduce(op, inbuf, outbuf, count, datatype);
     } else {
diff --git a/ompi/mca/osc/rdma/osc_rdma_accumulate.c b/ompi/mca/osc/rdma/osc_rdma_accumulate.c
index b12c94aa21d..2d0cf71a9c7 100644
--- a/ompi/mca/osc/rdma/osc_rdma_accumulate.c
+++ b/ompi/mca/osc/rdma/osc_rdma_accumulate.c
@@ -4,6 +4,7 @@
  *                         reserved.
  * Copyright (c) 2016      Research Organization for Information Science
  *                         and Technology (RIST). All rights reserved.
+ * Copyright (c) 2017 IBM Corporation.  All rights reserved.
  * $COPYRIGHT$
  *
  * Additional copyrights may follow
@@ -14,6 +15,7 @@
 #include "osc_rdma_accumulate.h"
 #include "osc_rdma_request.h"
 #include "osc_rdma_comm.h"
+#include "opal/util/show_help.h"
 
 #include "ompi/mca/osc/base/osc_base_obj_convert.h"
 
@@ -1026,6 +1028,46 @@ int ompi_osc_rdma_rget_accumulate_internal (ompi_osc_rdma_sync_t *sync, const vo
         return OMPI_SUCCESS;
     }
 
+    /* TODO: Remove the following check when support is added.
+     * See the following issue for the current state:
+     *   https://github.com/open-mpi/ompi/issues/1666
+     */
+    if(MPI_MINLOC == op || MPI_MAXLOC == op) {
+        if(MPI_SHORT_INT == origin_datatype ||
+           MPI_DOUBLE_INT == origin_datatype ||
+           MPI_LONG_INT == origin_datatype ||
+           MPI_LONG_DOUBLE_INT == origin_datatype) {
+           ompi_communicator_t *comm = &ompi_mpi_comm_world.comm;
+           opal_show_help("help-mca-osc-base.txt", "unsupported-dt", true,
+                          origin_datatype->name,
+                          op->o_name,
+                          comm->c_my_rank);
+           ompi_mpi_abort(comm, -1);
+        }
+        if(MPI_SHORT_INT == result_datatype ||
+           MPI_DOUBLE_INT == result_datatype ||
+           MPI_LONG_INT == result_datatype ||
+           MPI_LONG_DOUBLE_INT == result_datatype) {
+           ompi_communicator_t *comm = &ompi_mpi_comm_world.comm;
+           opal_show_help("help-mca-osc-base.txt", "unsupported-dt", true,
+                          result_datatype->name,
+                          op->o_name,
+                          comm->c_my_rank);
+           ompi_mpi_abort(comm, -1);
+        }
+        if(MPI_SHORT_INT == target_datatype ||
+           MPI_DOUBLE_INT == target_datatype ||
+           MPI_LONG_INT == target_datatype ||
+           MPI_LONG_DOUBLE_INT == target_datatype) {
+           ompi_communicator_t *comm = &ompi_mpi_comm_world.comm;
+           opal_show_help("help-mca-osc-base.txt", "unsupported-dt", true,
+                          target_datatype->name,
+                          op->o_name,
+                          comm->c_my_rank);
+           ompi_mpi_abort(comm, -1);
+        }
+    }
+
     (void) ompi_datatype_get_extent (origin_datatype, &lb, &extent);
 
     ret = osc_rdma_get_remote_segment (module, peer, target_disp, extent * target_count, &target_address, &target_handle);