diff --git a/src/gui/image/qicon.cpp b/src/gui/image/qicon.cpp
index dce902301c..a297c32b3c 100644
--- a/src/gui/image/qicon.cpp
+++ b/src/gui/image/qicon.cpp
@@ -945,6 +945,7 @@ void QIcon::setThemeName(const QString &name)
 */
 QString QIcon::themeName()
 {
+    QIconLoader::instance()->ensureInitialized();
     return QIconLoader::instance()->themeName();
 }