diff --git a/lib/meas/inline/io/inline_qio_read_obj.cc b/lib/meas/inline/io/inline_qio_read_obj.cc
index c6546b394..f2142a90d 100644
--- a/lib/meas/inline/io/inline_qio_read_obj.cc
+++ b/lib/meas/inline/io/inline_qio_read_obj.cc
@@ -364,7 +364,7 @@ namespace Chroma
 	    // BJOO: Yes that's all very well. but RecordXML has to hold something
 	    XMLBufferWriter dummy;
 	    push(dummy,"DummyRecordXML");
-	    write(dummy, "std::mapSize", num_vecs);
+	    write(dummy, "std_mapSize", num_vecs);
 	    pop(dummy);
 	    record_xml.open(dummy);