diff --git a/servant-openapi3.cabal b/servant-openapi3.cabal
--- a/servant-openapi3.cabal
+++ b/servant-openapi3.cabal
@@ -1,5 +1,5 @@
 name:                servant-openapi3
-version:             2.0.1.0
+version:             2.0.1.1
 synopsis:            Generate a Swagger/OpenAPI/OAS 3.0 specification for your servant API.
 description:
   Swagger is a project used to describe and document RESTful APIs. The core of the 
diff --git a/src/Servant/OpenApi/Internal.hs b/src/Servant/OpenApi/Internal.hs
--- a/src/Servant/OpenApi/Internal.hs
+++ b/src/Servant/OpenApi/Internal.hs
@@ -410,6 +410,11 @@
         & description .~ transDesc (reflectDescription (Proxy :: Proxy mods))
         & content .~ InsOrdHashMap.fromList [(t, mempty & schema ?~ ref) | t <- toList $ contentTypes (Proxy :: Proxy ct)]
 
+#if MIN_VERSION_servant(0,18,2)
+instance (HasOpenApi sub) => HasOpenApi (Fragment a :> sub) where
+  toOpenApi _ = toOpenApi (Proxy :: Proxy sub)
+#endif
+
 -- =======================================================================
 -- Below are the definitions that should be in Servant.API.ContentTypes
 -- =======================================================================