diff --git a/src/backend/libei/mod.rs b/src/backend/libei/mod.rs
index 48dfae4e6266..26231e736001 100644
--- a/src/backend/libei/mod.rs
+++ b/src/backend/libei/mod.rs
@@ -147,7 +147,11 @@ impl input::Device for request::Device {
     }
 
     fn has_capability(&self, capability: input::DeviceCapability) -> bool {
-        todo!()
+        if let Ok(capability) = DeviceCapability::try_from(capability) {
+            self.has_capability(capability)
+        } else {
+            false
+        }
     }
 
     fn usb_id(&self) -> Option<(u32, u32)> {
@@ -420,3 +424,19 @@ fn convert_request(request: EisRequest) -> Option<InputEvent<EiInput>> {
         _ => None,
     }
 }
+
+// XXX not a direct match?
+impl TryFrom<input::DeviceCapability> for DeviceCapability {
+    type Error = ();
+    fn try_from(other: input::DeviceCapability) -> Result<DeviceCapability, ()> {
+        match other {
+            input::DeviceCapability::Gesture => Err(()),
+            input::DeviceCapability::Keyboard => Ok(DeviceCapability::Keyboard),
+            input::DeviceCapability::Pointer => Ok(DeviceCapability::Pointer),
+            input::DeviceCapability::Switch => Err(()),
+            input::DeviceCapability::TabletPad => Err(()),
+            input::DeviceCapability::TabletTool => Err(()),
+            input::DeviceCapability::Touch => Ok(DeviceCapability::Touch),
+        }
+    }
+}