diff --git a/google.analytics/ga.d.ts b/google.analytics/ga.d.ts
index 505bb3b49..abc4d4a8d 100644
--- a/google.analytics/ga.d.ts
+++ b/google.analytics/ga.d.ts
@@ -56,7 +56,7 @@ declare module UniversalAnalytics {
             eventValue?: number,
             nonInteraction?: boolean}): void;
         (command: 'send', fieldsObject: {
-            hitType: 'event',
+            hitType: string, // 'event'
             eventCategory: string,
             eventAction: string,
             eventLabel?: string,