diff --git a/exercises/clock/.meta/DONT-TEST-STUB b/exercises/clock/.meta/DONT-TEST-STUB
deleted file mode 100644
index 456c37799..000000000
--- a/exercises/clock/.meta/DONT-TEST-STUB
+++ /dev/null
@@ -1 +0,0 @@
-We ask for the Clock to be an instance of Num; let students figure this out.
diff --git a/exercises/clock/package.yaml b/exercises/clock/package.yaml
index 6539c4fa9..b3b4f486c 100644
--- a/exercises/clock/package.yaml
+++ b/exercises/clock/package.yaml
@@ -1,5 +1,5 @@
 name: exercism-clock
-version: 2.4.0.9
+version: 2.4.0.10
 
 dependencies:
   - base
diff --git a/exercises/clock/src/Clock.hs b/exercises/clock/src/Clock.hs
index 6081a3c8f..0210fc7c5 100644
--- a/exercises/clock/src/Clock.hs
+++ b/exercises/clock/src/Clock.hs
@@ -1,6 +1,7 @@
 module Clock (addDelta, fromHourMin, toString) where
 
 data Clock = Dummy
+  deriving Eq
 
 fromHourMin :: Int -> Int -> Clock
 fromHourMin hour min = error "You need to implement this function."