diff --git a/Microsoft.Azure.Cosmos/src/ClientRetryPolicy.cs b/Microsoft.Azure.Cosmos/src/ClientRetryPolicy.cs
index 11391ddcbd..457fe5e9e8 100644
--- a/Microsoft.Azure.Cosmos/src/ClientRetryPolicy.cs
+++ b/Microsoft.Azure.Cosmos/src/ClientRetryPolicy.cs
@@ -310,7 +310,9 @@ private async Task<ShouldRetryResult> ShouldRetryInternalAsync(
             }
             
             // Received 503 due to client connect timeout or Gateway
-            if (statusCode == HttpStatusCode.ServiceUnavailable)
+            // 408 retry: limit to document resource-type?
+            if (statusCode == HttpStatusCode.ServiceUnavailable
+                || statusCode == HttpStatusCode.RequestTimeout) 
             {
                 return this.TryMarkEndpointUnavailableForPkRangeAndRetryOnServiceUnavailable(
                     shouldMarkEndpointUnavailableForPkRange: true);