diff --git a/src/org/labkey/cds/CDSManager.java b/src/org/labkey/cds/CDSManager.java
index 067ca4b09..bfcdcbbde 100644
--- a/src/org/labkey/cds/CDSManager.java
+++ b/src/org/labkey/cds/CDSManager.java
@@ -24,6 +24,7 @@
 import org.labkey.api.data.DbSchema;
 import org.labkey.api.data.DbScope;
 import org.labkey.api.data.PropertyManager;
+import org.labkey.api.data.PropertyManager.WritablePropertyMap;
 import org.labkey.api.data.RuntimeSQLException;
 import org.labkey.api.data.SQLFragment;
 import org.labkey.api.data.SimpleFilter;
@@ -273,7 +274,7 @@ public Map<String, String> getActiveUserProperties(User user, Container containe
 
     public void setActiveUserProperties(User user, Container container, Map<String, String> properties)
     {
-        PropertyManager.PropertyMap activeUserProperties = PropertyManager.getWritableProperties(user, container, CDS_ACTIVE_USER, true);
+        WritablePropertyMap activeUserProperties = PropertyManager.getWritableProperties(user, container, CDS_ACTIVE_USER, true);
         activeUserProperties.putAll(properties);
         activeUserProperties.save();
     }