diff --git a/webapp/src/edu/cornell/mannlib/vitro/webapp/dao/jena/UserAccountsDaoJena.java b/webapp/src/edu/cornell/mannlib/vitro/webapp/dao/jena/UserAccountsDaoJena.java
index 06f677691..38a811b50 100644
--- a/webapp/src/edu/cornell/mannlib/vitro/webapp/dao/jena/UserAccountsDaoJena.java
+++ b/webapp/src/edu/cornell/mannlib/vitro/webapp/dao/jena/UserAccountsDaoJena.java
@@ -9,6 +9,7 @@ import java.util.Comparator;
 import java.util.List;
 import java.util.Random;
 
+import com.hp.hpl.jena.ontology.OntClass;
 import com.hp.hpl.jena.ontology.OntModel;
 import com.hp.hpl.jena.ontology.OntResource;
 import com.hp.hpl.jena.rdf.model.Resource;
@@ -50,6 +51,10 @@ public class UserAccountsDaoJena extends JenaBaseDao implements UserAccountsDao
 				return null;
 			}
 
+			if (!isResourceOfType(r, USERACCOUNT)) {
+				return null;
+			}
+
 			UserAccount u = new UserAccount();
 			u.setUri(r.getURI());
 			u.setEmailAddress(getPropertyStringValue(r,
@@ -90,6 +95,7 @@ public class UserAccountsDaoJena extends JenaBaseDao implements UserAccountsDao
 			if (stmts.hasNext()) {
 				userUri = stmts.next().getSubject().getURI();
 			}
+			stmts.close();
 		} finally {
 			getOntModel().leaveCriticalSection();
 		}
@@ -227,6 +233,9 @@ public class UserAccountsDaoJena extends JenaBaseDao implements UserAccountsDao
 			if (r == null) {
 				return null;
 			}
+			if (!isResourceOfType(r, PERMISSIONSET)) {
+				return null;
+			}
 
 			PermissionSet ps = new PermissionSet();
 			ps.setUri(uri);
@@ -291,6 +300,23 @@ public class UserAccountsDaoJena extends JenaBaseDao implements UserAccountsDao
 				+ errMsg);
 	}
 
+	/**
+	 * Since there is no reasoner on the UserAccountModel, this will return a
+	 * false negative for a subtype of the specified type.
+	 * 
+	 * There should already be a lock on the model when this is called.
+	 */
+	private boolean isResourceOfType(OntResource r, OntClass type) {
+		StmtIterator stmts = getOntModel().listStatements(r, RDF.type, type);
+		if (stmts.hasNext()) {
+			stmts.close();
+			return true;
+		} else {
+			stmts.close();
+			return false;
+		}
+	}
+
 	private static class PermissionSetsByUri implements
 			Comparator<PermissionSet> {
 		@Override
diff --git a/webapp/test/edu/cornell/mannlib/vitro/webapp/dao/jena/UserAccountsDaoJenaTest.java b/webapp/test/edu/cornell/mannlib/vitro/webapp/dao/jena/UserAccountsDaoJenaTest.java
index 157f826f1..330ea9428 100644
--- a/webapp/test/edu/cornell/mannlib/vitro/webapp/dao/jena/UserAccountsDaoJenaTest.java
+++ b/webapp/test/edu/cornell/mannlib/vitro/webapp/dao/jena/UserAccountsDaoJenaTest.java
@@ -103,6 +103,13 @@ public class UserAccountsDaoJenaTest extends AbstractTestClass {
 		UserAccount u = dao.getUserAccountByUri("bogusUri");
 		assertNull("null result", u);
 	}
+	
+	@Test
+	public void getUserAccountByUriWrongType() {
+		UserAccount u = dao.getUserAccountByUri(URI_ROLE1);
+		System.out.println(u);
+		assertNull("null result", u);
+	}
 
 	@Test
 	public void getUserAccountByEmailSuccess() {
@@ -264,6 +271,12 @@ public class UserAccountsDaoJenaTest extends AbstractTestClass {
 		assertNull("null result", ps);
 	}
 
+	@Test
+	public void getPermissionSetByUriWrongType() {
+		PermissionSet ps = dao.getPermissionSetByUri(URI_USER1);
+		assertNull("null result", ps);
+	}
+	
 	@Test
 	public void getAllPermissionSets() {
 		setLoggerLevel(JenaBaseDao.class, Level.DEBUG);