diff --git a/src/utils/getMessages.js b/src/utils/getMessages.js
index 2b687a7..90f934b 100644
--- a/src/utils/getMessages.js
+++ b/src/utils/getMessages.js
@@ -6,7 +6,13 @@ import { objectExpressionToObject } from './ast-helper';
 export default function getMessages(
   referencePath: BabelPath,
 ): Array<MessageDescriptor> {
-  const properties = referencePath.parentPath.get('arguments.0.properties');
+  const arg0 = referencePath.parentPath.get('arguments.0');
+
+  const properties =
+    arg0.type === 'TSAsExpression'
+      ? arg0.get('expression.properties')
+      : arg0.get('properties');
+
   const messages = properties
     .map(property => property.get('value'))
     .map(objectExpressionToObject);