diff --git a/converter/sun_usb/matrix.c b/converter/sun_usb/matrix.c
index c2b38ae0..0cea3700 100644
--- a/converter/sun_usb/matrix.c
+++ b/converter/sun_usb/matrix.c
@@ -75,6 +75,8 @@ void matrix_init(void)
         }
     }
     print(" Done\n");
+
+    PORTD &= ~(1<<6);
     return;
 }