diff --git a/DDCore/src/plugins/DetectorChecksum.cpp b/DDCore/src/plugins/DetectorChecksum.cpp
index 7c5c7c584f84c63434f3edfda24d079950661090..5d284829a476a5fadcb99957d3b34bd3a483a472 100644
--- a/DDCore/src/plugins/DetectorChecksum.cpp
+++ b/DDCore/src/plugins/DetectorChecksum.cpp
@@ -546,9 +546,9 @@ const DetectorChecksum::entry_t& DetectorChecksum::handleSolid(Solid solid) cons
           except("DetectorChecksum","+++ TGeoTessellated volume with unsupported number of vertices: %s", solid.name());
         }
         for (int ivertex = 0; ivertex < facet.GetNvert(); ivertex++) {
-          log << " vertex" << ivertex + 1 << "=\"" << nam << "_v" << facet.GetVertexIndex(ivertex);
+          log << " vertex" << ivertex + 1 << "=\"" << nam << "_v" << facet.GetVertexIndex(ivertex) << "\"";
         }
-        log << "type=\"ABSOLUTE\"/>" << newline;
+        log << " type=\"ABSOLUTE\"/>" << newline;
       }
       log << "</tessellated>" << newline;
     }