diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+# 0.1.2.0
+
+- Changed the `NoThunks` instance for `MonoidMap` to report `MonoidMap`
+  rather than `Map` in the context of any thunk that it finds.
+
 # 0.1.1.1
 
 - Adapted to the revised module structure of `monoidmap-internal-0.4.0.0`.
diff --git a/components/monoidmap/Data/MonoidMap.hs b/components/monoidmap/Data/MonoidMap.hs
--- a/components/monoidmap/Data/MonoidMap.hs
+++ b/components/monoidmap/Data/MonoidMap.hs
@@ -232,7 +232,7 @@
 import GHC.Exts
     ( IsList (Item) )
 import NoThunks.Class
-    ( NoThunks )
+    ( NoThunks (showTypeOf, wNoThunks) )
 import Text.Read
     ( Read (..) )
 
@@ -528,8 +528,6 @@
           -- ^ @since 0.0.0.0
         , NFData
           -- ^ @since 0.0.0.0
-        , NoThunks
-          -- ^ @since 0.0.0.0
         )
         via NonNullMap k v
     deriving
@@ -630,6 +628,15 @@
 
 fromListConstr :: Constr
 fromListConstr = mkConstr dataType "fromList" [] Prefix
+
+--------------------------------------------------------------------------------
+-- Instances: NoThunks
+--------------------------------------------------------------------------------
+
+-- | @since 0.0.0.0
+instance (NoThunks k, NoThunks v) => NoThunks (MonoidMap k v) where
+    showTypeOf _ = "MonoidMap"
+    wNoThunks ctx = wNoThunks ctx . toMap
 
 --------------------------------------------------------------------------------
 -- Instances: Semigroup and subclasses
diff --git a/monoidmap.cabal b/monoidmap.cabal
--- a/monoidmap.cabal
+++ b/monoidmap.cabal
@@ -1,6 +1,6 @@
 cabal-version:  3.0
 name:           monoidmap
-version:        0.1.1.1
+version:        0.1.2.0
 homepage:       https://github.com/jonathanknowles/monoidmap
 bug-reports:    https://github.com/jonathanknowles/monoidmap/issues
 license:        Apache-2.0
@@ -32,7 +32,7 @@
 common dependency-monoid-subclasses
     build-depends:monoid-subclasses             >= 1.2.3      && < 1.3
 common dependency-monoidmap-internal
-    build-depends:monoidmap-internal            >= 0.4.0.0    && < 0.5
+    build-depends:monoidmap-internal            >= 0.5.0.0    && < 0.6
 common dependency-nothunks
     build-depends:nothunks                      >= 0.1.3      && < 0.4
 common dependency-pretty-show