diff --git a/hw/input/ps2.c b/hw/input/ps2.c
index 8485a4edaf2ce1e1f22e8511eaf7aff0369cb227..1d3a440bbd36dee1714d68c7941aa9be5d78b21f 100644
--- a/hw/input/ps2.c
+++ b/hw/input/ps2.c
@@ -881,9 +881,11 @@ static void ps2_mouse_event(DeviceState *dev, QemuConsole *src,
                             InputEvent *evt)
 {
     static const int bmap[INPUT_BUTTON__MAX] = {
-        [INPUT_BUTTON_LEFT]   = MOUSE_EVENT_LBUTTON,
-        [INPUT_BUTTON_MIDDLE] = MOUSE_EVENT_MBUTTON,
-        [INPUT_BUTTON_RIGHT]  = MOUSE_EVENT_RBUTTON,
+        [INPUT_BUTTON_LEFT]   = PS2_MOUSE_BUTTON_LEFT,
+        [INPUT_BUTTON_MIDDLE] = PS2_MOUSE_BUTTON_MIDDLE,
+        [INPUT_BUTTON_RIGHT]  = PS2_MOUSE_BUTTON_RIGHT,
+        [INPUT_BUTTON_SIDE]   = PS2_MOUSE_BUTTON_SIDE,
+        [INPUT_BUTTON_EXTRA]  = PS2_MOUSE_BUTTON_EXTRA,
     };
     PS2MouseState *s = (PS2MouseState *)dev;
     InputMoveEvent *move;
diff --git a/include/hw/input/ps2.h b/include/hw/input/ps2.h
index b9ceee4154d25f40027d311d4cdea317da5b7070..0fec91cdb07734e92414483861988b7f249fff99 100644
--- a/include/hw/input/ps2.h
+++ b/include/hw/input/ps2.h
@@ -25,6 +25,12 @@
 #ifndef HW_PS2_H
 #define HW_PS2_H
 
+#define PS2_MOUSE_BUTTON_LEFT   0x01
+#define PS2_MOUSE_BUTTON_MIDDLE 0x02
+#define PS2_MOUSE_BUTTON_RIGHT  0x04
+#define PS2_MOUSE_BUTTON_SIDE   0x08
+#define PS2_MOUSE_BUTTON_EXTRA  0x10
+
 /* ps2.c */
 void *ps2_kbd_init(void (*update_irq)(void *, int), void *update_arg);
 void *ps2_mouse_init(void (*update_irq)(void *, int), void *update_arg);