diff --git a/src/plugins/platformthemes/gtk3/qgtk3theme.cpp b/src/plugins/platformthemes/gtk3/qgtk3theme.cpp
index 03371f0492..553cd70d8f 100644
--- a/src/plugins/platformthemes/gtk3/qgtk3theme.cpp
+++ b/src/plugins/platformthemes/gtk3/qgtk3theme.cpp
@@ -254,6 +254,7 @@ const QFont *QGtk3Theme::font(Font type) const
 QIcon QGtk3Theme::fileIcon(const QFileInfo &fileInfo,
                            QPlatformTheme::IconOptions iconOptions) const
 {
+    Q_UNUSED(iconOptions);
     Q_ASSERT(m_storage);
     return m_storage->fileIcon(fileInfo);
 }