diff --git a/repo/repo-sql-impl-test/src/test/java/com/evolveum/midpoint/repo/sql/QueryInterpreter2Test.java b/repo/repo-sql-impl-test/src/test/java/com/evolveum/midpoint/repo/sql/QueryInterpreter2Test.java
index 729e745e858..216dc75293b 100644
--- a/repo/repo-sql-impl-test/src/test/java/com/evolveum/midpoint/repo/sql/QueryInterpreter2Test.java
+++ b/repo/repo-sql-impl-test/src/test/java/com/evolveum/midpoint/repo/sql/QueryInterpreter2Test.java
@@ -1397,7 +1397,7 @@ public void test330InOidTest() throws Exception {
                     "from\n" +
                     "  RObject o\n" +
                     "where\n" +
-                    "  o.oid in :oid\n";
+                    "  o.oid in (:oid)\n";
             assertEqualsIgnoreWhitespace(expected, real);
         } finally {
             close(session);
@@ -1417,7 +1417,7 @@ public void test335OwnerInOidTest() throws Exception {
                     "from\n" +
                     "  RAccessCertificationCase a\n" +
                     "where\n" +
-                    "  a.ownerOid in :ownerOid";
+                    "  a.ownerOid in (:ownerOid)";
             assertEqualsIgnoreWhitespace(expected, real);
         } finally {
             close(session);
@@ -2021,7 +2021,7 @@ public void test550queryObjectClassTypeAbstractRole() throws Exception {
                     "from\n" +
                     "  RObject o\n" +
                     "where\n" +
-                    "  o.objectTypeClass in :objectTypeClass";
+                    "  o.objectTypeClass in (:objectTypeClass)";
 
             assertEqualsIgnoreWhitespace(expected, real);
         } finally {
@@ -2292,6 +2292,36 @@ public void test600QueryObjectypeByTypeComplex() throws Exception {
         }
     }
 
+    @Test
+    public void test601QueryObjectypeByTwoAbstractTypes() throws Exception {
+        Session session = open();
+        try {
+            ObjectQuery query = QueryBuilder.queryFor(ObjectType.class, prismContext)
+                    .type(FocusType.class).block().endBlock()
+					.or().type(AbstractRoleType.class).block().endBlock()
+                    .build();
+            String real = getInterpretedQuery2(session, ObjectType.class, query);
+            String expected = "select\n"
+					+ "  o.fullObject,\n"
+					+ "  o.stringsCount,\n"
+					+ "  o.longsCount,\n"
+					+ "  o.datesCount,\n"
+					+ "  o.referencesCount,\n"
+					+ "  o.polysCount,\n"
+					+ "  o.booleansCount\n"
+					+ "from\n"
+					+ "  RObject o\n"
+					+ "where\n"
+					+ "  (\n"
+					+ "    o.objectTypeClass in (:objectTypeClass) or\n"
+					+ "    o.objectTypeClass in (:objectTypeClass2)\n"
+					+ "  )\n";
+            assertEqualsIgnoreWhitespace(expected, real);
+        } finally {
+            close(session);
+        }
+    }
+
     @Test
     public void test605QueryObjectypeByTypeAndReference() throws Exception {
         Session session = open();
diff --git a/repo/repo-sql-impl/src/main/java/com/evolveum/midpoint/repo/sql/query2/hqm/condition/InCondition.java b/repo/repo-sql-impl/src/main/java/com/evolveum/midpoint/repo/sql/query2/hqm/condition/InCondition.java
index 58495499d22..36ae9824760 100644
--- a/repo/repo-sql-impl/src/main/java/com/evolveum/midpoint/repo/sql/query2/hqm/condition/InCondition.java
+++ b/repo/repo-sql-impl/src/main/java/com/evolveum/midpoint/repo/sql/query2/hqm/condition/InCondition.java
@@ -48,7 +48,12 @@ public void dumpToHql(StringBuilder sb, int indent) {
         if (values != null) {
             String parameterNamePrefix = createParameterName(propertyPath);
             String parameterName = rootHibernateQuery.addParameter(parameterNamePrefix, values);        // TODO special treatment of collections?
-            sb.append(propertyPath).append(" in :").append(parameterName);
+            // these parentheses are here because of hibernate bug, manifesting itself as MID-3390
+            boolean useParentheses = values.size() != 1;        // just a (quite dubious) optimization
+            sb.append(propertyPath).append(" in ")
+                    .append(useParentheses ? "(" : "")
+                    .append(":").append(parameterName)
+                    .append(useParentheses ? ")" : "");
         } else {
             sb.append(propertyPath).append(" in (").append(innerQueryText).append(")");
         }