diff --git a/right/src/usb_interface_keyboard.c b/right/src/usb_interface_keyboard.c
index dd3489c..ee3b34b 100644
--- a/right/src/usb_interface_keyboard.c
+++ b/right/src/usb_interface_keyboard.c
@@ -86,6 +86,7 @@ static usb_status_t UsbKeyboardAction(void)
             }
         }
         GPIO_WritePinOutput(keyMatrix.cols[col].gpio, keyMatrix.cols[col].pin, 0);
+        for (volatile uint32_t i=0; i<100; i++);
     }
 
 /*