diff --git a/src/propertymaputil_p.h b/src/propertymaputil_p.h
--- a/src/propertymaputil_p.h
+++ b/src/propertymaputil_p.h
@@ -23,15 +23,23 @@
 
 /**
  * Converts the property map into a variant map
- * using the property name as key.
+ * using the property name as key. Converts maps
+ * with duplicated keys into single entry maps
+ * with lists.
  */
 static inline QVariantMap toNamedVariantMap(const KFileMetaData::PropertyMap& propMap)
 {
     QVariantMap map;
-    KFileMetaData::PropertyMap::const_iterator it = propMap.constBegin();
-    for (; it != propMap.constEnd(); it++) {
-        KFileMetaData::PropertyInfo pi(it.key());
-        map.insertMulti(pi.name(), it.value());
+
+    auto uniqueKeys = propMap.uniqueKeys();
+    for (const auto& key : uniqueKeys)
+    {
+        KFileMetaData::PropertyInfo pi(key);
+        if (propMap.count(key) > 1) {
+            map.insert(pi.name(), propMap.values(key));
+        } else {
+            map.insert(pi.name(), propMap.value(key));
+        }
     }
 
     return map;