diff --git a/src/device/mouse_ps2.c b/src/device/mouse_ps2.c
index 0d34235fe..2c1722f51 100644
--- a/src/device/mouse_ps2.c
+++ b/src/device/mouse_ps2.c
@@ -333,13 +333,13 @@ ps2_poll(void *priv)
     atkbc_dev_t *dev = (atkbc_dev_t *) priv;
     int packet_size = (dev->flags & FLAG_INTMODE) ? 4 : 3;
 
-    int cond = (!mouse_capture && !video_fullscreen) || (!mouse_scan || !mouse_state_changed()) ||
-               ((dev->mode == MODE_STREAM) && (kbc_at_dev_queue_pos(dev, 1) >= (FIFO_SIZE - packet_size)));
+    int cond = (mouse_capture || video_fullscreen) && mouse_scan && (dev->mode == MODE_STREAM) &&
+               mouse_state_changed() && (kbc_at_dev_queue_pos(dev, 1) < (FIFO_SIZE - packet_size));
 
-    if (!cond && (dev->mode == MODE_STREAM))
+    if (cond)
         ps2_report_coordinates(dev, 1);
 
-    return cond;
+    return !cond;
 }
 
 /*