diff --git a/components/rx/trunk/tooledit.pas b/components/rx/trunk/tooledit.pas
index b0a00a93f..53c564104 100644
--- a/components/rx/trunk/tooledit.pas
+++ b/components/rx/trunk/tooledit.pas
@@ -608,7 +608,7 @@ begin
     ABounds := Screen.MonitorFromPoint(P).BoundsRect;
 
     Y := P.Y + Height;
-    if Y + FPopup.Height > ABounds.Right then
+    if Y + FPopup.Height > ABounds.Bottom then
       Y := P.Y - FPopup.Height;
     case FPopupAlign of
       epaRight: