diff --git a/lib/cpp/test/Makefile.am b/lib/cpp/test/Makefile.am
index 6779ac6..c1fad3e 100755
--- a/lib/cpp/test/Makefile.am
+++ b/lib/cpp/test/Makefile.am
@@ -82,7 +82,8 @@
 	UnitTestMain.cpp \
 	TMemoryBufferTest.cpp \
 	TBufferBaseTest.cpp \
-	Base64Test.cpp
+	Base64Test.cpp \
+	ToStringTest.cpp
 
 if !WITH_BOOSTTHREADS
 UnitTests_SOURCES += \