diff --git a/modules/io/src/mol/chemdict_parser.cc b/modules/io/src/mol/chemdict_parser.cc
index 654204dcd6591d31267b67bbde7b14ddabea19b4..f760a00d4a5b8ff01e55d2a9d4357c0f16ac8337 100644
--- a/modules/io/src/mol/chemdict_parser.cc
+++ b/modules/io/src/mol/chemdict_parser.cc
@@ -182,6 +182,7 @@ void ChemdictParser::InitTypeMap()
   tm_["PEPTIDE-LINKING"]=mol::ChemClass(mol::ChemClass::PEPTIDE_LINKING);  
   tm_["NON-POLYMER"]=mol::ChemClass(mol::ChemClass::NON_POLYMER);
   tm_["RNA OH 3 PRIME TERMINUS"]=mol::ChemClass(mol::ChemClass::RNA_LINKING);
+  tm_["RNA OH 5 PRIME TERMINUS"]=mol::ChemClass(mol::ChemClass::RNA_LINKING);
   tm_["?"]=mol::ChemClass(mol::ChemClass::UNKNOWN);  
   tm_["WATER"]=mol::ChemClass(mol::ChemClass::WATER);
 }