diff --git a/src/shell/casparcg.config b/src/shell/casparcg.config
index bcee8fe592..3eec0e9d8e 100644
--- a/src/shell/casparcg.config
+++ b/src/shell/casparcg.config
@@ -55,6 +55,7 @@
 <html>
     <remote-debugging-port>0 [0|1024-65535]</remote-debugging-port>
     <enable-gpu>false [true|false]</enable-gpu>
+	<angle-backend>gl [|gl|d3d11|d3d9]</angle-backend>
 </html>
 <system-audio>
     <producer>
