diff --git a/src/device/mouse_serial.c b/src/device/mouse_serial.c
index b50a3c987..8ed4865cd 100644
--- a/src/device/mouse_serial.c
+++ b/src/device/mouse_serial.c
@@ -378,7 +378,6 @@ sermouse_report(mouse_t *dev)
             break;
 
         default:
-            pclog("unknown dev->format = %02X\n", dev->format);
             break;
     }