diff --git a/tmux.h b/tmux.h
index 22fb80a4..c7bebe6d 100644
--- a/tmux.h
+++ b/tmux.h
@@ -945,7 +945,7 @@ RB_HEAD(sessions, session);
 
 /* Mouse wheel states. */
 #define MOUSE_WHEEL_UP 0
-#define MOUSE_WHEEL_DOWN 64
+#define MOUSE_WHEEL_DOWN 1
 
 /* Mouse helpers. */
 #define MOUSE_BUTTONS(b) ((b) & MOUSE_MASK_BUTTONS)
diff --git a/window-copy.c b/window-copy.c
index 78667b1e..e35e6070 100644
--- a/window-copy.c
+++ b/window-copy.c
@@ -529,7 +529,7 @@ window_copy_command(struct window_pane *wp, struct client *c, struct session *s,
 		return;
 	command = args->argv[0];
 
-	if (m != NULL && m->valid)
+	if (m != NULL && m->valid && !MOUSE_WHEEL(m->b))
 		window_copy_move_mouse(m);
 
 	if (args->argc == 1) {