diff --git a/src/gui/platform/unix/qgenericunixthemes.cpp b/src/gui/platform/unix/qgenericunixthemes.cpp
index 86f2a266ea..1a564a5360 100644
--- a/src/gui/platform/unix/qgenericunixthemes.cpp
+++ b/src/gui/platform/unix/qgenericunixthemes.cpp
@@ -733,6 +733,7 @@ QGnomeTheme::QGnomeTheme()
 
 QVariant QGnomeTheme::themeHint(QPlatformTheme::ThemeHint hint) const
 {
+    Q_D(const QGnomeTheme);
     switch (hint) {
     case QPlatformTheme::DialogButtonBoxButtonsHaveIcons:
         return QVariant(true);
@@ -757,6 +758,9 @@ QVariant QGnomeTheme::themeHint(QPlatformTheme::ThemeHint hint) const
         return QVariant(QChar(0x2022));
     case QPlatformTheme::UiEffects:
         return QVariant(int(HoverEffect));
+    case QPlatformTheme::ButtonPressKeys:
+        return QVariant::fromValue(
+                QList<Qt::Key>({ Qt::Key_Space, Qt::Key_Return, Qt::Key_Enter, Qt::Key_Select }));
     default:
         break;
     }