1 files changed, 1 insertions, 1 deletions

diff --git a/src/uk/ac/ox/cs/pagoda/query/AnswerTuple.java b/src/uk/ac/ox/cs/pagoda/query/AnswerTuple.java
index cb2b0a3..78aced1 100644
--- a/src/uk/ac/ox/cs/pagoda/query/AnswerTuple.java
+++ b/src/uk/ac/ox/cs/pagoda/query/AnswerTuple.java
@@ -172,7 +172,7 @@ public class AnswerTuple {
                                                 String lexicalForm = matcher.group("lexicalForm");
                                                 String dataTypeIRI = matcher.group("dataType");
                                                 Datatype dataType;
-                                                if (dataTypeIRI.isEmpty()) dataType = Datatype.RDF_PLAIN_LITERAL;
+                                                if(dataTypeIRI == null || dataTypeIRI.isEmpty()) dataType = Datatype.RDF_PLAIN_LITERAL;
                                                 else dataType = uk.ac.ox.cs.JRDFox.model.Datatype.value(dataTypeIRI);
                                                 terms[i] = uk.ac.ox.cs.JRDFox.model.Literal.create(lexicalForm, dataType);
                                         }