diff --git a/config-serializer/Function.d.ts b/config-serializer/Function.d.ts
new file mode 100644
index 00000000..972f81ba
--- /dev/null
+++ b/config-serializer/Function.d.ts
@@ -0,0 +1,3 @@
+interface Function {
+    name: string;
+}
diff --git a/config-serializer/Serializable.ts b/config-serializer/Serializable.ts
index 8c8d8119..c7b0b50a 100644
--- a/config-serializer/Serializable.ts
+++ b/config-serializer/Serializable.ts
@@ -1,7 +1,3 @@
-interface Function {
-    name: string;
-}
-
 abstract class Serializable<T> {
 
     private static depth = 0;
diff --git a/config-serializer/test-serializer.ts b/config-serializer/test-serializer.ts
index e8046d5e..d2cf75e6 100644
--- a/config-serializer/test-serializer.ts
+++ b/config-serializer/test-serializer.ts
@@ -1,3 +1,4 @@
+/// <reference path="Function.d.ts" />
 /// <reference path="assert.ts" />
 /// <reference path="Serializable.ts" />
 /// <reference path="ClassArray.ts" />