diff --git a/index.js b/index.js
index d023717..f71252e 100644
--- a/index.js
+++ b/index.js
@@ -112,7 +112,7 @@ function MomentLocalesPlugin(options) {
 
         return new ContextReplacementPlugin(
             /moment[\/\\]locale/,
-            new RegExp('(' + regExpPatterns.join('|') + ')$')
+            new RegExp('[/\\\\](' + regExpPatterns.join('|') + ')$')
         );
     } else {
         return new IgnorePlugin(/^\.\/locale$/, /moment$/);
diff --git a/package.json b/package.json
index ee7c390..019a07f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "moment-locales-webpack-plugin",
-    "version": "1.1.1-0",
+    "version": "1.1.1",
     "description": "Strip unused locales from Moment.js",
     "main": "index.js",
     "scripts": {
diff --git a/test/test.js b/test/test.js
index d314692..b6a873e 100644
--- a/test/test.js
+++ b/test/test.js
@@ -82,6 +82,24 @@ describe('webpack build', () => {
         expect(localeModules).toHaveLength(1);
         expect(localeModules[0]).toMatch('moment/locale/en-gb');
     });
+
+    // Covers https://github.com/iamakulov/moment-locales-webpack-plugin/issues/13
+    test('doesn’t include locales whose names intersect with a passed locale', async () => {
+        const modulePaths = await runWithWebpack({
+            localesToKeep: ['ca'],
+        });
+
+        const momentModule = modulePaths.find(path =>
+            path.includes('moment/moment.js')
+        );
+        expect(momentModule).toBeTruthy();
+
+        const localeModules = modulePaths.filter(path =>
+            path.includes(`moment/locale`)
+        );
+        expect(localeModules).toHaveLength(1);
+        expect(localeModules[0]).toMatch('moment/locale/ca');
+    });
 });
 
 describe('validation', () => {