diff --git a/panda/src/pgui/pgSliderBar.cxx b/panda/src/pgui/pgSliderBar.cxx
index e666d2a496..d423549ccb 100644
--- a/panda/src/pgui/pgSliderBar.cxx
+++ b/panda/src/pgui/pgSliderBar.cxx
@@ -605,8 +605,10 @@ item_press(PGItem *item, const MouseWatcherParameter &param) {
       ClockObject::get_global_clock()->get_frame_time() + scroll_initial_delay;
 
   } else if (item == _thumb_button) {
-    _scroll_button_held = nullptr;
-    begin_drag();
+    if (((PGButton *)item)->has_click_button(param.get_button())) {
+      _scroll_button_held = nullptr;
+      begin_drag();
+    }
   }
 }