diff --git a/unittests/ADT/CMakeLists.txt b/unittests/ADT/CMakeLists.txt
index 09ca89944ba..0f39e02c1ff 100644
--- a/unittests/ADT/CMakeLists.txt
+++ b/unittests/ADT/CMakeLists.txt
@@ -18,6 +18,7 @@ set(ADTSources
   IntEqClassesTest.cpp
   IntervalMapTest.cpp
   IntrusiveRefCntPtrTest.cpp
+  MapVectorTest.cpp
   PackedVectorTest.cpp
   SCCIteratorTest.cpp
   SmallPtrSetTest.cpp