diff --git a/src/cmd/go/build.go b/src/cmd/go/build.go
index 1b5b7f4498de8c399ba1503323419030d89a446f..5c1c783ab483dc1ab6ffbd670fe60512e2853bb8 100644
--- a/src/cmd/go/build.go
+++ b/src/cmd/go/build.go
@@ -62,7 +62,8 @@ The build flags are shared by the build, install, run, and test commands:
 		print the commands.
 	-race
 		enable data race detection.
-		Currently supported only on linux/amd64 and darwin/amd64.
+		Currently supported only on linux/amd64,
+		darwin/amd64 and windows/amd64.
 
 	-ccflags 'arg list'
 		arguments to pass on each 5c, 6c, or 8c compiler invocation