diff --git a/doc/protocols.texi b/doc/protocols.texi
index 4957aff081..f30567d839 100644
--- a/doc/protocols.texi
+++ b/doc/protocols.texi
@@ -638,7 +638,7 @@ avplay sap://[ff0e::2:7ffe]
 
 @section tcp
 
-Trasmission Control Protocol.
+Transmission Control Protocol.
 
 The required syntax for a TCP url is:
 @example