diff --git a/sdk/core/azure-core/src/http/retry_policy.cpp b/sdk/core/azure-core/src/http/retry_policy.cpp
index 81f2eb133..54e470b97 100644
--- a/sdk/core/azure-core/src/http/retry_policy.cpp
+++ b/sdk/core/azure-core/src/http/retry_policy.cpp
@@ -31,7 +31,7 @@ bool GetResponseHeaderBasedDelay(RawResponse const& response, Delay& retryAfter)
     return true;
   }
 
-  if ((header = responseHeaders.find("Retry-After")) != responseHeadersEnd)
+  if ((header = responseHeaders.find("retry-after")) != responseHeadersEnd)
   {
     // This header is in seconds.
     retryAfter = std::chrono::seconds(std::stoi(header->second));