diff --git a/CHANGES.md b/CHANGES.md
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,10 @@
 Release notes for `units`
 =========================
 
+Version 2.4.1.2
+---------------
+* Compatibility with singletons 2.6 and GHC 8.8, further thanks to @ocharles.
+
 Version 2.4.1.1
 ---------------
 * Fix some GHC compatibility issues, thanks to @ocharles.
diff --git a/Data/Metrology/Z.hs b/Data/Metrology/Z.hs
--- a/Data/Metrology/Z.hs
+++ b/Data/Metrology/Z.hs
@@ -11,6 +11,9 @@
 {-# LANGUAGE TypeFamilies, DataKinds, TypeOperators, UndecidableInstances,
              GADTs, PolyKinds, TemplateHaskell, ScopedTypeVariables,
              EmptyCase, CPP, TypeSynonymInstances, FlexibleInstances #-}
+#if __GLASGOW_HASKELL__ >= 800
+{-# LANGUAGE TypeApplications #-}
+#endif
 {-# OPTIONS_GHC -fno-warn-missing-signatures #-}
 
 -----------------------------------------------------------------------------
@@ -36,7 +39,12 @@
 
 module Data.Metrology.Z (
   -- * The 'Z' datatype
-  Z(..), Sing(..), SZ,
+  Z(..),
+#if MIN_VERSION_singletons(2,6,0)
+  Sing, SZ(..),
+#else
+  Sing(..), SZ,
+#endif
 
 #if MIN_VERSION_singletons(1,0,0)
   -- ** Defunctionalization symbols (these can be ignored)
diff --git a/units.cabal b/units.cabal
--- a/units.cabal
+++ b/units.cabal
@@ -1,11 +1,11 @@
 name:           units
-version:        2.4.1.1
+version:        2.4.1.2
 cabal-version:  >= 1.10
 synopsis:       A domain-specific type system for dimensional analysis
 homepage:       https://github.com/goldfirere/units
 category:       Math
-author:         Richard Eisenberg <rae@cs.brynmawr.edu>
-maintainer:     Richard Eisenberg <rae@cs.brynmawr.edu>, Takayuki Muranushi <muranushi@gmail.com>
+author:         Richard Eisenberg <rae@richarde.dev>, Takayuki Muranushi <muranushi@gmail.com>
+maintainer:     Richard Eisenberg <rae@richarde.dev>
 bug-reports:    https://github.com/goldfirere/units/issues
 stability:      experimental
 extra-source-files: README.md
@@ -24,7 +24,7 @@
 license:        BSD3
 license-file:   LICENSE
 build-type:     Simple
-Tested-With: GHC == 7.8.4, GHC == 7.10.2, GHC == 7.10.3, GHC == 8.0.1, GHC == 8.0.2, GHC == 8.2.2, GHC == 8.4.4, GHC == 8.6.1, GHC == 8.6.3 
+Tested-With: GHC == 7.8.4, GHC == 7.10.2, GHC == 7.10.3, GHC == 8.0.1, GHC == 8.0.2, GHC == 8.2.2, GHC == 8.4.4, GHC == 8.6.1, GHC == 8.6.3, GHC == 8.8.1
 description:
 
     The units package provides a mechanism for compile-time
@@ -47,7 +47,7 @@
 source-repository this
   type:     git
   location: https://github.com/goldfirere/units.git
-  tag:      v2.4.1.1
+  tag:      v2.4.1.2
 
 library
   ghc-options: -Wall