diff --git a/src/cmd/compile/internal/ssa/README.md b/src/cmd/compile/internal/ssa/README.md
index 2c602f160c..8184f9c002 100644
--- a/src/cmd/compile/internal/ssa/README.md
+++ b/src/cmd/compile/internal/ssa/README.md
@@ -206,6 +206,16 @@ name, e.g.
 This will match any function named "Foo" within a package whose final
 suffix is "blah" (e.g. something/blah.Foo, anotherthing/extra/blah.Foo).
 
+The users may also print the Control Flow Graph(CFG) by specifying in
+`GOSSAFUNC` value in the following format:
+
+	GOSSAFUNC="$FunctionName:$PassName1,$PassName2,..." go build
+
+For example, the following command will print SSA with CFGs attached to the
+`sccp` and `generic deadcode` pass columns:
+
+	GOSSAFUNC="blah.Foo:sccp,generic deadcode" go build
+
 If non-HTML dumps are needed, append a "+" to the GOSSAFUNC value
 and dumps will be written to stdout: