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diff --git a/gnuradio-examples/c++/dial_tone/README b/gnuradio-examples/c++/dial_tone/README
index cfc545802..6d5ed5059 100644
--- a/gnuradio-examples/c++/dial_tone/README
+++ b/gnuradio-examples/c++/dial_tone/README
@@ -1,2 +1,16 @@
This example requires that gr-audio-alsa be built in the main tree in order
to compile successfully. It is not built automatically.
+
+To build this example, you must make two modifications to the build system:
+
+1) Add the following line inside config/grc_gnuradio_examples.m4:
+
+ gnuradio-examples/c++/dial_tone/Makefile
+
+ ...to the list of Makefiles already in there.
+
+2) In gnuradio-examples/c++/Makefile.am, uncomment the SUBDIRS line
+
+# SUBDIRS = dial_tone
+
+Then, from the top-level directory, re-run ./bootstrap and ./configure. \ No newline at end of file