diff --git a/win32/w32main.cpp b/win32/w32main.cpp
index 99edf4c..509fe2e 100644
--- a/win32/w32main.cpp
+++ b/win32/w32main.cpp
@@ -490,7 +490,7 @@ done:
                 (r.bottom - r.top), TRUE);
             // If the window is growing, then the scrollbar position may
             // be moving, so it's as if we're dragging the scrollbar.
-            HandleTextWindowScrollBar(0, 0);
+            HandleTextWindowScrollBar(-1, -1);
             InvalidateRect(TextWnd, NULL, FALSE);
             break;
         }