diff --git a/common/changes/@uifabric/utilities/fix-export-IClassNames-from-utilities_2018-02-12-18-07.json b/common/changes/@uifabric/utilities/fix-export-IClassNames-from-utilities_2018-02-12-18-07.json
new file mode 100644
index 00000000000000..31bd9bfe99bbc4
--- /dev/null
+++ b/common/changes/@uifabric/utilities/fix-export-IClassNames-from-utilities_2018-02-12-18-07.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "@uifabric/utilities",
+      "comment": "Export IClassNames fro Utilities for creating private getClassNames methods",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@uifabric/utilities",
+  "email": "v-jojanz@microsoft.com"
+}
\ No newline at end of file
diff --git a/packages/utilities/src/index.ts b/packages/utilities/src/index.ts
index 6349375a6812c3..ef210f20ebc26d 100644
--- a/packages/utilities/src/index.ts
+++ b/packages/utilities/src/index.ts
@@ -8,6 +8,7 @@ export * from './DelayedRender';
 export * from './EventGroup';
 export * from './FabricPerformance';
 export * from './GlobalSettings';
+export * from './IClassNames';
 export * from './IDisposable';
 export * from './IPoint';
 export * from './IRectangle';