diff --git a/client/js/s3/util.js b/client/js/s3/util.js
index eef5d551f..d6aa199a1 100644
--- a/client/js/s3/util.js
+++ b/client/js/s3/util.js
@@ -329,6 +329,10 @@ qq.s3.util = qq.s3.util || (function() {
                     }
                     else if (spec.signatureVersion === 4) {
                         awsParams[qq.s3.util.V4_SIGNATURE_PARAM_NAME] = policyAndSignature.signature;
+
+                        if (policyAndSignature.date) {
+                            awsParams[qq.s3.util.DATE_PARAM_NAME] = policyAndSignature.date;
+                        }
                     }
 
                     if (updatedSessionToken) {