diff --git a/ompi/mca/coll/base/coll_base_reduce.c b/ompi/mca/coll/base/coll_base_reduce.c
index 37585dd0b6..5c5585141f 100644
--- a/ompi/mca/coll/base/coll_base_reduce.c
+++ b/ompi/mca/coll/base/coll_base_reduce.c
@@ -99,7 +99,8 @@ int ompi_coll_base_reduce_generic( const void* sendbuf, void* recvbuf, int origi
 
         /* If this is a non-commutative operation we must copy
            sendbuf to the accumbuf, in order to simplfy the loops */
-        if (!ompi_op_is_commute(op)) {
+        
+        if (!ompi_op_is_commute(op) && MPI_IN_PLACE != sendbuf) {
             ompi_datatype_copy_content_same_ddt(datatype, original_count,
                                                 (char*)accumbuf,
                                                 (char*)sendtmpbuf);