diff --git a/src/Glutinum.Converter/Reader/UnionTypeNode.fs b/src/Glutinum.Converter/Reader/UnionTypeNode.fs
index 9e5c50b..590f55b 100644
--- a/src/Glutinum.Converter/Reader/UnionTypeNode.fs
+++ b/src/Glutinum.Converter/Reader/UnionTypeNode.fs
@@ -79,18 +79,6 @@ let rec private readUnionTypeCases
             | Some declarations ->
                 if declarations.Count = 0 then
                     None // Should it be obj ?
-                else if declarations.Count > 1 then
-                    let fullName = checker.getFullyQualifiedName symbol
-
-                    ({
-                        Name = typeReferenceNode.getText ()
-                        FullName = fullName
-                        TypeArguments = []
-                        IsStandardLibrary = isFromEs5Lib symbolOpt
-                    })
-                    |> GlueType.TypeReference
-                    |> List.singleton
-                    |> Some
                 else if isFromEs5Lib symbolOpt then
                     reader.ReadTypeNode typeReferenceNode
                     |> List.singleton
diff --git a/tests/specs/references/unionType/withArray.d.ts b/tests/specs/references/unionType/withArray.d.ts
new file mode 100644
index 0000000..7cdc46c
--- /dev/null
+++ b/tests/specs/references/unionType/withArray.d.ts
@@ -0,0 +1 @@
+export type NumberOrNumberArray = number | Array<number>
diff --git a/tests/specs/references/unionType/withArray.fsx b/tests/specs/references/unionType/withArray.fsx
new file mode 100644
index 0000000..30c6097
--- /dev/null
+++ b/tests/specs/references/unionType/withArray.fsx
@@ -0,0 +1,12 @@
+module rec Glutinum
+
+open Fable.Core
+open Fable.Core.JsInterop
+open System
+
+type NumberOrNumberArray =
+    U2<float, ResizeArray<float>>
+
+(***)
+#r "nuget: Fable.Core"
+(***)