diff --git a/src/fe-text/mainwindows.c b/src/fe-text/mainwindows.c
index 3b8a4aa1..d3a3c8fd 100644
--- a/src/fe-text/mainwindows.c
+++ b/src/fe-text/mainwindows.c
@@ -550,7 +550,7 @@ void mainwindow_set_size(MAIN_WINDOW_REC *window, int size)
 {
         size -= window->height;
 	if (size < 0)
-		mainwindow_shrink(window, size);
+		mainwindow_shrink(window, -size);
 	else
 		mainwindow_grow(window, size);
 }