diff --git a/src/core/kexipartinfo.cpp b/src/core/kexipartinfo.cpp
--- a/src/core/kexipartinfo.cpp
+++ b/src/core/kexipartinfo.cpp
@@ -21,6 +21,7 @@
 #include "kexipartinfo_p.h"
 #include "kexipartmanager.h"
 #include "KexiMainWindowIface.h"
+#include <KexiJsonTrader.h>
 
 #include <KDbGlobal>
 
@@ -41,7 +42,7 @@
     return 0 == s.compare(QLatin1String("true"), Qt::CaseInsensitive);
 }
 
-Info::Private::Private(Info *info, const QJsonObject &rootObject)
+Info::Private::Private(Info *info, const QPluginLoader &loader)
     : untranslatedGroupName(info->value("X-Kexi-GroupName"))
     , typeName(info->value("X-Kexi-TypeName"))
     , supportedViewModes(0)
@@ -53,7 +54,8 @@
     , isPropertyEditorAlwaysVisibleInDesignMode(
           isTrue(info, "X-Kexi-PropertyEditorAlwaysVisibleInDesignMode", true))
 {
-    groupName = info->readTranslatedString(rootObject, "X-Kexi-GroupName", untranslatedGroupName);
+    const QJsonObject metaDataObject = KexiJsonTrader::metaDataObjectForPluginLoader(loader);
+    groupName = info->readTranslatedString(metaDataObject, "X-Kexi-GroupName", untranslatedGroupName);
     const QStringList serviceTypes = info->serviceTypes();
     if (serviceTypes.contains("Kexi/Viewer")) {
         supportedViewModes |= Kexi::DataViewMode;
@@ -65,14 +67,15 @@
         supportedViewModes |= Kexi::TextViewMode;
     }
 
-    const QJsonArray userServiceTypes = rootObject.value("X-Kexi-ServiceTypesInUserMode").toArray();
-    if (userServiceTypes.contains(QJsonValue("Kexi/Viewer"))) {
+    const QStringList userServiceTypes = metaDataObject.value("X-Kexi-ServiceTypesInUserMode")
+            .toString().split(QLatin1Char(',')); // NOTE: toArray() does not work
+    if (userServiceTypes.contains("Kexi/Viewer")) {
         supportedUserViewModes |= Kexi::DataViewMode;
     }
-    if (userServiceTypes.contains(QJsonValue("Kexi/Designer"))) {
+    if (userServiceTypes.contains("Kexi/Designer")) {
         supportedUserViewModes |= Kexi::DesignViewMode;
     }
-    if (userServiceTypes.contains(QJsonValue("Kexi/Editor"))) {
+    if (userServiceTypes.contains("Kexi/Editor")) {
         supportedUserViewModes |= Kexi::TextViewMode;
     }
 }
@@ -132,7 +135,7 @@
 //}
 
 Info::Info(const QPluginLoader &loader)
-    : KexiPluginMetaData(loader), d(new Private(this, rootObject()))
+    : KexiPluginMetaData(loader), d(new Private(this, loader))
 {
 }
 
diff --git a/src/core/kexipartinfo_p.h b/src/core/kexipartinfo_p.h
--- a/src/core/kexipartinfo_p.h
+++ b/src/core/kexipartinfo_p.h
@@ -31,7 +31,7 @@
 class Q_DECL_HIDDEN Info::Private
 {
 public:
-    Private(Info *info, const QJsonObject &rootObject);
+    Private(Info *info, const QPluginLoader &loader);
 
     //! used in StaticItem class
     Private();
diff --git a/src/kexiutils/KexiPluginMetaData.h b/src/kexiutils/KexiPluginMetaData.h
--- a/src/kexiutils/KexiPluginMetaData.h
+++ b/src/kexiutils/KexiPluginMetaData.h
@@ -67,12 +67,6 @@
      */
     void setErrorMessage(const QString& errorMessage);
 
-    /**
-     * @return root object for this plugin, useful to retrieve Kexi-specific fields using
-     * readStringList(), readTranslatedValue() or readTranslatedString().
-     */
-    QJsonObject rootObject() const;
-
 private:
     Q_DISABLE_COPY(KexiPluginMetaData)
     class Private;
diff --git a/src/kexiutils/KexiPluginMetaData.cpp b/src/kexiutils/KexiPluginMetaData.cpp
--- a/src/kexiutils/KexiPluginMetaData.cpp
+++ b/src/kexiutils/KexiPluginMetaData.cpp
@@ -28,8 +28,7 @@
 class Q_DECL_HIDDEN KexiPluginMetaData::Private
 {
 public:
-    Private(KexiPluginMetaData *info, const QPluginLoader &loader)
-     : rootObject(KexiJsonTrader::rootObjectForPluginLoader(loader))
+    Private(KexiPluginMetaData *info)
     {
         QStringList v(info->version().split('.'));
         bool ok = v.count() >= 2;
@@ -45,16 +44,15 @@
         }
     }
 
-    QJsonObject rootObject;
     QString errorMessage;
     int majorVersion;
     int minorVersion;
 };
 
 //------------------------------
 
 KexiPluginMetaData::KexiPluginMetaData(const QPluginLoader &loader)
-    : KPluginMetaData(loader), d(new Private(this, loader))
+    : KPluginMetaData(loader), d(new Private(this))
 {
 }
 
@@ -87,8 +85,3 @@
 {
     return d->minorVersion;
 }
-
-QJsonObject KexiPluginMetaData::rootObject() const
-{
-    return d->rootObject;
-}