diff --git a/lib/cpp/test/Makefile.am b/lib/cpp/test/Makefile.am
index d387297..f61cff1 100755
--- a/lib/cpp/test/Makefile.am
+++ b/lib/cpp/test/Makefile.am
@@ -123,7 +123,8 @@
 
 if !WITH_BOOSTTHREADS
 UnitTests_SOURCES += \
-    RWMutexStarveTest.cpp
+  concurrency/MutexTest.cpp \
+  concurrency/RWMutexStarveTest.cpp
 endif
 
 UnitTests_LDADD = \