diff --git a/test/test.hpp b/test/test.hpp
index 4a02dafdc..f7f071eba 100644
--- a/test/test.hpp
+++ b/test/test.hpp
@@ -45,6 +45,8 @@ POSSIBILITY OF SUCH DAMAGE.
 #define EXPORT BOOST_SYMBOL_IMPORT
 #endif
 
+void EXPORT report_failure(char const* err, char const* file, int line);
+
 #if defined(_MSC_VER)
 #define COUNTER_GUARD(x)
 #else