diff --git a/src/Plugin.js b/src/Plugin.js
index 6c2fed6..a74f88f 100644
--- a/src/Plugin.js
+++ b/src/Plugin.js
@@ -5,7 +5,7 @@ function transCamel(_str, symbol) {
   // e.g. QRCode
   // First match: QR
   // Second match: Code
-  const cells = _str.match(/([A-Z]+(?=[A-Z]))|([A-Z][^A-Z]+)/g);
+  const cells = _str.match(/([A-Z]+(?=[A-Z]))|([A-Z]?[^A-Z]+)/g) || [];
   return cells.map(c => c.toLowerCase()).join(symbol);
 }
 
diff --git a/test/fixtures/qr-code/actual.js b/test/fixtures/qr-code/actual.js
new file mode 100644
index 0000000..62c1d3b
--- /dev/null
+++ b/test/fixtures/qr-code/actual.js
@@ -0,0 +1,8 @@
+import { QRCode } from 'antd';
+
+switch(QRCode){
+  case QRCode:
+    console.log('foo');
+  default:
+    console.log('bar')
+}
diff --git a/test/fixtures/qr-code/expected.js b/test/fixtures/qr-code/expected.js
new file mode 100644
index 0000000..1f747ba
--- /dev/null
+++ b/test/fixtures/qr-code/expected.js
@@ -0,0 +1,7 @@
+import _QRCode from "antd/lib/qr-code";
+switch (_QRCode) {
+  case _QRCode:
+    console.log('foo');
+  default:
+    console.log('bar');
+}
\ No newline at end of file