diff --git a/src/luaenginegui/luaengine/LuaEngineGui.cpp b/src/luaenginegui/luaengine/LuaEngineGui.cpp
index a9dd2be..f8bbf38 100644
--- a/src/luaenginegui/luaengine/LuaEngineGui.cpp
+++ b/src/luaenginegui/luaengine/LuaEngineGui.cpp
@@ -173,7 +173,11 @@ int LuaEngineGui::showFileDialog(lua_State *L_p)
         }
     }
     QFileDialog fileDialog(parent);
+#if QT_VERSION >= 0x050900
     fileDialog.setWindowFlag(Qt::WindowContextHelpButtonHint, false);
+#else
+    fileDialog.setWindowFlags(fileDialog.windowFlags()^Qt::WindowContextHelpButtonHint);
+#endif
     fileDialog.setWindowTitle(dialogTitle);
     fileDialog.setAcceptMode(fileAcceptMode);
     fileDialog.setNameFilter(fileFormats);
@@ -531,7 +535,11 @@ int LuaEngineGui::createDialog(lua_State *L_p)
         }
     }
     QDialog *dialog = new QDialog(parent);
+#if QT_VERSION >= 0x050900
     dialog->setWindowFlag(Qt::WindowContextHelpButtonHint, false);
+#else
+    dialog->setWindowFlags(dialog->windowFlags()^Qt::WindowContextHelpButtonHint);
+#endif
     dialog->setObjectName(nameForPointer(dialog));
     dialog->setWindowTitle(windowTitle);
     pushPointer(L_p, dialog);