diff --git a/test/collate_info/collate_info.cpp b/test/collate_info/collate_info.cpp
index e0d95819..4c400059 100644
--- a/test/collate_info/collate_info.cpp
+++ b/test/collate_info/collate_info.cpp
@@ -11,6 +11,7 @@
 
 // most of the workarounds and headers we need are already in here:
 #include <boost/regex.hpp> 
+#include <boost/regex/v4/primary_transform.hpp>
 #include <assert.h>
 
 #ifdef BOOST_NO_STDC_NAMESPACE