diff --git a/Code/Mantid/Framework/MDEvents/CMakeLists.txt b/Code/Mantid/Framework/MDEvents/CMakeLists.txt
index 5fef1695807e786e1914d74abdc18e84d67c526e..f5eb586e7034229114326238ee1a31ad09ec88d0 100644
--- a/Code/Mantid/Framework/MDEvents/CMakeLists.txt
+++ b/Code/Mantid/Framework/MDEvents/CMakeLists.txt
@@ -28,6 +28,7 @@ set ( SRC_UNITY_IGNORE_FILES
     src/IMDBox.cpp
 	src/MDBin.cpp
     src/MDBox.cpp
+    src/MDBoxIterator.cpp
     src/MDEventWorkspace.cpp
     src/MDGridBox.cpp
     #src/MDSplitBox.cpp