diff --git a/src/lib.rs b/src/lib.rs
index 5e5f899..79ba68e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -461,5 +461,5 @@ impl<const L: usize> UsbBus for UsbDevice<L> {
 }
 
 const RESTRICT_RW_FLAG: u8 = !(1 << 5);
-const USBINT_CLEAR: u8 = !(1 << 0);
-const UDINT_CLEAR: u8 = !(1 << 1 | 1 << 7);
+const USBINT_CLEAR: u8 = 1 << 0;
+const UDINT_CLEAR: u8 = !(1 << 7 | 1 << 1);