diff --git a/src/constants.rs b/src/constants.rs
index f9e6841..4e3b44c 100644
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -1,7 +1,7 @@
 /// Event types supported by the device.
 ///
 /// This is implemented as a newtype around the u16 "type" field of `libc::input_event`.
-#[derive(Copy, Clone, PartialEq, Eq)]
+#[derive(Copy, Clone, PartialEq, Eq, Hash)]
 pub struct EventType(pub u16);
 
 evdev_enum!(