diff --git a/src/slic3r/GUI/OG_CustomCtrl.cpp b/src/slic3r/GUI/OG_CustomCtrl.cpp
index c7ca05a904..4ff7e0778c 100644
--- a/src/slic3r/GUI/OG_CustomCtrl.cpp
+++ b/src/slic3r/GUI/OG_CustomCtrl.cpp
@@ -496,7 +496,7 @@ bool OG_CustomCtrl::update_visibility(ConfigOptionMode mode)
 // BBS: call by Tab/Page
 void OG_CustomCtrl::fixup_items_positions()
 {
-    if (GetParent() == nullptr || GetPosition().y < GetParent()->GetSize().y)
+    if (GetParent() == nullptr || GetPosition().y + GetSize().y < GetParent()->GetSize().y)
         return;
     for (CtrlLine& line : ctrl_lines) {
         line.correct_items_positions();