diff --git a/collects/mzscheme/examples/hello.c b/collects/mzscheme/examples/hello.c
index 1afbcd9371..6654e0482e 100644
--- a/collects/mzscheme/examples/hello.c
+++ b/collects/mzscheme/examples/hello.c
@@ -7,6 +7,13 @@
      mzc --ld hello.so hello.o
    And load with
      (load-extension "hello.so")
+
+   For 3m, compile with:
+     mzc --xform hello.c
+     mzc --3m --cc hello.3m.c
+     mzc --3m --ld hello.so hello.o
+   And load with
+     (load-extension "hello.so")
 */
 
 #include "escheme.h"