diff --git a/dahdit-test.cabal b/dahdit-test.cabal
--- a/dahdit-test.cabal
+++ b/dahdit-test.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           dahdit-test
-version:        0.5.0
+version:        0.5.1
 synopsis:       Test utils for Dahdit serde
 description:    Please see the README on GitHub at <https://github.com/ejconlon/dahdit-test#readme>
 homepage:       https://github.com/ejconlon/dahdit-test#readme
diff --git a/src/Test/Dahdit/GenDefault.hs b/src/Test/Dahdit/GenDefault.hs
--- a/src/Test/Dahdit/GenDefault.hs
+++ b/src/Test/Dahdit/GenDefault.hs
@@ -230,7 +230,8 @@
 deriving via
   (ViaGeneric (D p) (a, b, c, d, e))
   instance
-    (GenDefault (D p) a, GenDefault (D p) b, GenDefault (D p) c, GenDefault (D p) d, GenDefault (D p) e) => GenDefault (D p) (a, b, c, d, e)
+    (GenDefault (D p) a, GenDefault (D p) b, GenDefault (D p) c, GenDefault (D p) d, GenDefault (D p) e)
+    => GenDefault (D p) (a, b, c, d, e)
 
 instance (LengthBounds (D p) [a], GenDefault (D p) a) => GenDefault (D p) [a] where
   genDefault = genListLike id