diff --git a/ompi/mpi/c/alltoall.c b/ompi/mpi/c/alltoall.c
index 63c997d44e..f2c4350e68 100644
--- a/ompi/mpi/c/alltoall.c
+++ b/ompi/mpi/c/alltoall.c
@@ -92,7 +92,8 @@ int MPI_Alltoall(const void *sendbuf, int sendcount, MPI_Datatype sendtype,
         }
     }
 
-    if( !OMPI_COMM_IS_INTER(comm) ){
+    if (! OMPI_COMM_IS_INTER(comm)) {
+        ompi_datatype_type_size(recvtype, &recvtype_size);
         if( (0 == recvcount) || (0 == recvtype_size) ) {
             return MPI_SUCCESS;
         }