diff --git a/infra/prism/src/main/java/com/evolveum/midpoint/prism/marshaller/PrismUnmarshaller.java b/infra/prism/src/main/java/com/evolveum/midpoint/prism/marshaller/PrismUnmarshaller.java
index 799fdfcb4ce..2c8323f6768 100644
--- a/infra/prism/src/main/java/com/evolveum/midpoint/prism/marshaller/PrismUnmarshaller.java
+++ b/infra/prism/src/main/java/com/evolveum/midpoint/prism/marshaller/PrismUnmarshaller.java
@@ -347,12 +347,26 @@ private <T> PrismPropertyValue<T> parsePropertyValue(@NotNull XNode node,
         }
     }
 
-    private <T> boolean isValueAllowed(T realValue, PrismPropertyDefinition<T> definition) {
+    private <T> boolean isValueAllowed(T realValue, PrismPropertyDefinition<T> definition) throws SchemaException {
         if (definition == null || CollectionUtils.isEmpty(definition.getAllowedValues())) {
             return true;
         }
+        if (realValue == null) {
+            return true;        // TODO: ok?
+        }
+        String serializedForm;
+        if (realValue instanceof Enum) {
+            PrimitiveXNode<String> prim = (PrimitiveXNode<String>) getBeanMarshaller().marshall(realValue);
+            serializedForm = prim.getValue();
+        } else {
+            serializedForm = null;
+        }
+
         return definition.getAllowedValues().stream()
-                .anyMatch(displayableValue -> realValue.equals(displayableValue.getValue()));
+                .anyMatch(displayableValue ->
+                        realValue.equals(displayableValue.getValue())
+                        || serializedForm != null && serializedForm.equals(displayableValue.getValue())
+                );
     }
 
     @NotNull
@@ -586,7 +600,11 @@ private BeanUnmarshaller getBeanUnmarshaller() {
         return ((PrismContextImpl) prismContext).getBeanUnmarshaller();
     }
 
-	private SchemaRegistry getSchemaRegistry() {
+    private BeanMarshaller getBeanMarshaller() {
+        return ((PrismContextImpl) prismContext).getBeanMarshaller();
+    }
+
+    private SchemaRegistry getSchemaRegistry() {
 		return prismContext.getSchemaRegistry();
 	}
 
diff --git a/infra/prism/src/main/java/com/evolveum/midpoint/prism/query/EqualFilter.java b/infra/prism/src/main/java/com/evolveum/midpoint/prism/query/EqualFilter.java
index 35a748388b6..12b830161fc 100644
--- a/infra/prism/src/main/java/com/evolveum/midpoint/prism/query/EqualFilter.java
+++ b/infra/prism/src/main/java/com/evolveum/midpoint/prism/query/EqualFilter.java
@@ -68,14 +68,14 @@ public EqualFilter(@NotNull ItemPath path, @Nullable PrismPropertyDefinition<T>
 
 	// empty (different from values as it generates filter with null 'values' attribute)
 	@NotNull
-	public static <T> EqualFilter<T> createEqual(@NotNull ItemPath path, @NotNull PrismPropertyDefinition<T> definition,
+	public static <T> EqualFilter<T> createEqual(@NotNull ItemPath path, @Nullable PrismPropertyDefinition<T> definition,
 			@Nullable QName matchingRule) {
 		return new EqualFilter<T>(path, definition, matchingRule, null, null, null, null);
 	}
 
 	// values
 	@NotNull
-	public static <T> EqualFilter<T> createEqual(@NotNull ItemPath path, @NotNull PrismPropertyDefinition<T> definition,
+	public static <T> EqualFilter<T> createEqual(@NotNull ItemPath path, @Nullable PrismPropertyDefinition<T> definition,
 			@Nullable QName matchingRule, @NotNull PrismContext prismContext, Object... values) {
 		List<PrismPropertyValue<T>> propertyValues = anyArrayToPropertyValueList(prismContext, values);
 		return new EqualFilter<T>(path, definition, matchingRule, propertyValues, null, null, null);
diff --git a/infra/prism/src/main/java/com/evolveum/midpoint/prism/xml/XsdTypeMapper.java b/infra/prism/src/main/java/com/evolveum/midpoint/prism/xml/XsdTypeMapper.java
index c7a1a604756..1a475d4551a 100644
--- a/infra/prism/src/main/java/com/evolveum/midpoint/prism/xml/XsdTypeMapper.java
+++ b/infra/prism/src/main/java/com/evolveum/midpoint/prism/xml/XsdTypeMapper.java
@@ -32,6 +32,7 @@
 
 import org.apache.commons.lang.StringUtils;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import org.w3c.dom.Element;
 
 import com.evolveum.midpoint.prism.PrismConstants;
@@ -177,12 +178,13 @@ public static Class<?> getTypeFromClass(Class<?> clazz) {
         return null;
     }
 
-    @NotNull
+    @Nullable
     public static <T> Class<T> toJavaType(@NotNull QName xsdType) {
 		//noinspection ConstantConditions
 		return toJavaType(xsdToJavaTypeMap, xsdType, true);
     }
 
+    @Nullable
     public static <T> Class<T> toJavaTypeIfKnown(@NotNull QName xsdType) {
         return toJavaType(xsdToJavaTypeMap, xsdType, false);
     }
@@ -197,6 +199,7 @@ public static <T> Class<T> toJavaTypeIfKnownExt(@NotNull QName xsdType) {
         }
     }
 
+    @Nullable
     private static <T> Class<T> toJavaType(Map<QName, Class> map, @NotNull QName xsdType, boolean errorIfNoMapping) {
         Class<?> javaType = map.get(xsdType);
 		if (javaType == null && StringUtils.isEmpty(xsdType.getNamespaceURI())) {