diff --git a/lcl/interfaces/qt5/qtwidgets.pas b/lcl/interfaces/qt5/qtwidgets.pas
index b0464bad1e..1d3ef9f142 100644
--- a/lcl/interfaces/qt5/qtwidgets.pas
+++ b/lcl/interfaces/qt5/qtwidgets.pas
@@ -5431,6 +5431,7 @@ begin
     QtKey_QuoteLeft: Result := VK_OEM_3;
     QtKey_BraceLeft,
     QtKey_BracketLeft: Result := VK_OEM_4;
+    QtKey_Bar: Result := VK_LCL_BACKSLASH;
     QtKey_BackSlash: Result := VK_OEM_5;
     QtKey_BraceRight,
     QtKey_BracketRight: Result := VK_OEM_6;
diff --git a/lcl/interfaces/qt6/qtwidgets.pas b/lcl/interfaces/qt6/qtwidgets.pas
index 08d5897a92..a7a21e3221 100644
--- a/lcl/interfaces/qt6/qtwidgets.pas
+++ b/lcl/interfaces/qt6/qtwidgets.pas
@@ -5438,6 +5438,7 @@ begin
     QtKey_QuoteLeft: Result := VK_OEM_3;
     QtKey_BraceLeft,
     QtKey_BracketLeft: Result := VK_OEM_4;
+    QtKey_Bar: Result := VK_LCL_BACKSLASH;
     QtKey_BackSlash: Result := VK_OEM_5;
     QtKey_BraceRight,
     QtKey_BracketRight: Result := VK_OEM_6;