diff --git a/Documentation/trace/ftrace.rst b/Documentation/trace/ftrace.rst
index b37dc19e4d40950fb46d9016cb99f4b905271580..60bceb018d6a9372cd57aaee4e16e54dc6595e10 100644
--- a/Documentation/trace/ftrace.rst
+++ b/Documentation/trace/ftrace.rst
@@ -564,7 +564,7 @@ of ftrace. Here is a list of some of the key files:
 
 	start::
 
-		trace_fd = open("trace_marker", WR_ONLY);
+		trace_fd = open("trace_marker", O_WRONLY);
 
 	Note: Writing into the trace_marker file can also initiate triggers
 	      that are written into /sys/kernel/tracing/events/ftrace/print/trigger