diff --git a/api-guide/source/faults.rst b/api-guide/source/faults.rst
index 97232740b9b6..e0eace8fda09 100644
--- a/api-guide/source/faults.rst
+++ b/api-guide/source/faults.rst
@@ -17,7 +17,7 @@ Every request made has a unique Request ID.
 This is returned in a response header.
 Here is an example response header:
 
-X-Compute-Request-ID: req-4b9e5c04-c40f-4b4f-960e-6ac0858dca6c
+X-Compute-Request-Id: req-4b9e5c04-c40f-4b4f-960e-6ac0858dca6c
 
 Server Actions
 --------------