diff --git a/README b/README
index bbffb82..7531c04 100644
--- a/README
+++ b/README
@@ -34,7 +34,7 @@ First up, how do I build?
 Add cJSON.c to your project, and put cJSON.h somewhere in the header search path.
 For example, to build the test app:
 
-gcc cJSON.c test.c -o test
+gcc cJSON.c test.c -o test -lm
 ./test
 
 
@@ -244,4 +244,4 @@ which are more complex than I'd care to try and stash into a const char array[].
 Enjoy cJSON!
 
 
-- Dave Gamble, Aug 2009
\ No newline at end of file
+- Dave Gamble, Aug 2009