diff --git a/ompi/datatype/dt_unpack.c b/ompi/datatype/dt_unpack.c
index 53b57d43b2..4f0279d078 100644
--- a/ompi/datatype/dt_unpack.c
+++ b/ompi/datatype/dt_unpack.c
@@ -765,7 +765,12 @@ int32_t ompi_ddt_copy_content_same_ddt( const ompi_datatype_t* datatype, int32_t
      */
     if( (datatype->flags & DT_FLAG_CONTIGUOUS) == DT_FLAG_CONTIGUOUS ) {
         long extent = (datatype->ub - datatype->lb);
-        if( (long)datatype->size == (datatype->true_ub - datatype->true_lb) ) {  /* all contiguous */
+	/* Now that we know the datatype is contiguous, we should move the 2 pointers
+	 * source and destination to the correct displacement. 
+	 */
+	pDestBuf += datatype->lb;
+	pSrcBuf += datatype->lb;
+	if( (long)datatype->size == extent ) {  /* all contiguous == no gaps around */
             int total_length = datatype->size * count;
             lastLength = 128 * 1024;
             if( lastLength > total_length ) lastLength = total_length;