diff --git a/libraries/base/Data/Fixed.hs b/libraries/base/Data/Fixed.hs
index ab517059d250d2cc088cd02adbf0e50c6c2d059a..e99efea25682cd88d4d88bf22480452cb807570e 100644
--- a/libraries/base/Data/Fixed.hs
+++ b/libraries/base/Data/Fixed.hs
@@ -83,6 +83,7 @@ instance (Typeable k,Typeable a) => Data (Fixed (a :: k)) where
 class HasResolution (a :: k) where
     resolution :: p a -> Integer
 
+-- | For example, @Fixed 1000@ will give you a 'Fixed' with a resolution of 1000.
 instance KnownNat n => HasResolution n where
     resolution _ = natVal (Proxy :: Proxy n)
 
diff --git a/libraries/base/changelog.md b/libraries/base/changelog.md
index 6da0c70b36b182e6568a47b69536a8037400b77b..9fbf5273c5da47d6d4ee029569155fd09eda301e 100644
--- a/libraries/base/changelog.md
+++ b/libraries/base/changelog.md
@@ -5,6 +5,8 @@
 
   * Add a `TestEquality` instance for the `Compose` newtype.
 
+  * Add `HasResolution` instances for `Nat`s.
+
 ## 4.13.0.0 *TBA*
   * Bundled with GHC *TBA*