diff --git a/kstyle/breezestyle.cpp b/kstyle/breezestyle.cpp
index d8e018bc..5d3a8def 100644
--- a/kstyle/breezestyle.cpp
+++ b/kstyle/breezestyle.cpp
@@ -168,7 +168,11 @@ private:
 //_______________________________________________________________
 bool isProgressBarHorizontal(const QStyleOptionProgressBar *option)
 {
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     return option && (option->state & QStyle::State_Horizontal);
+#else
+    return option && ((option->state & QStyle::State_Horizontal) || option->orientation == Qt::Horizontal);
+#endif
 }
 
 enum class ToolButtonMenuArrowStyle {