1 files changed, 2 insertions, 1 deletions

diff --git a/src/uk/ac/ox/cs/pagoda/rules/LowerDatalogProgram.java b/src/uk/ac/ox/cs/pagoda/rules/LowerDatalogProgram.java
index 199d167..9930009 100644
--- a/src/uk/ac/ox/cs/pagoda/rules/LowerDatalogProgram.java
+++ b/src/uk/ac/ox/cs/pagoda/rules/LowerDatalogProgram.java
@@ -1,5 +1,6 @@
 package uk.ac.ox.cs.pagoda.rules;
 
+import org.apache.commons.io.FilenameUtils;
 import org.semanticweb.HermiT.Reasoner;
 import org.semanticweb.HermiT.model.*;
 import org.semanticweb.owlapi.model.*;
@@ -76,7 +77,7 @@ public class LowerDatalogProgram extends ApproxProgram implements IncrementalPro
 
         @Override
         public String getOutputPath() {
-                return getDirectory() + "lower.dlog";
+                return FilenameUtils.concat(getDirectory(), "lower.dlog");
         }
         
 //      @Override