diff --git a/pom.xml b/pom.xml
index 18594609ad..7b81d8dca3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,7 +10,7 @@
     <artifactId>alfresco-data-model</artifactId>
     <name>Alfresco Data Model</name>
     <description>Alfresco Data Model classes</description>
-    <version>6.12-SNAPSHOT</version>
+    <version>6.13-SNAPSHOT</version>
 
     <scm>
         <connection>scm:git:https://github.com/Alfresco/alfresco-data-model.git</connection>
diff --git a/src/main/java/org/alfresco/service/cmr/search/IntervalSet.java b/src/main/java/org/alfresco/service/cmr/search/IntervalSet.java
index 70b04db93f..77861beed3 100644
--- a/src/main/java/org/alfresco/service/cmr/search/IntervalSet.java
+++ b/src/main/java/org/alfresco/service/cmr/search/IntervalSet.java
@@ -116,8 +116,9 @@ public class IntervalSet
     {
         StringBuilder sb = new StringBuilder("");
         sb.append(startInclusive?"[":"<")
-                    .append(start)
-                    .append(" TO "+end)
+                    .append("\"").append(start).append("\"")
+                    .append(" TO ")
+                    .append("\"").append(end).append("\"")
                     .append(endInclusive?"]":">");
         return sb.toString();
     }