diff --git a/overloaded_function/test/Jamfile.v2 b/overloaded_function/test/Jamfile.v2
index 6b4c0b0..079b116 100644
--- a/overloaded_function/test/Jamfile.v2
+++ b/overloaded_function/test/Jamfile.v2
@@ -7,6 +7,9 @@
 
 import testing ;
 
+# Workaround a Boost.Config bug that causes Boost.Typeof to fail on Sun.
+project : requirements <toolset>sun:<define>__typeof__=__typeof__ ;
+
 run functor.cpp ;
 run make_decl.cpp ;
 run make_call.cpp ;