diff --git a/src/cascadia/TerminalControl/TermControl.cpp b/src/cascadia/TerminalControl/TermControl.cpp
index cc4e14728c3..da4b256e70c 100644
--- a/src/cascadia/TerminalControl/TermControl.cpp
+++ b/src/cascadia/TerminalControl/TermControl.cpp
@@ -1422,6 +1422,13 @@ namespace winrt::Microsoft::Terminal::Control::implementation
                     _selectionNeedsToBeCopied = true;
                 }
 
+                if (_terminal->IsSelectionActive())
+                {
+                    // GH#9787: if selection is active we don't want to track the touchdown position
+                    // so that dragging the mouse will extend the selection rather than starting the new one
+                    _singleClickTouchdownPos = std::nullopt;
+                }
+
                 _renderer->TriggerSelection();
             }
             else if (point.Properties().IsRightButtonPressed())