diff --git a/Source/CMakeLists.txt b/Source/CMakeLists.txt
index 8a6e300540..9896b17c31 100644
--- a/Source/CMakeLists.txt
+++ b/Source/CMakeLists.txt
@@ -146,10 +146,10 @@ SET(SRCS
   cmProperty.h
   cmPropertyDefinition.cxx
   cmPropertyDefinition.h
-  cmPropertyDefinitionMap.cxx
-  cmPropertyDefinitionMap.h
-  cmPropertyMap.cxx
-  cmPropertyMap.h
+#  cmPropertyDefinitionMap.cxx
+#  cmPropertyDefinitionMap.h
+#  cmPropertyMap.cxx
+#  cmPropertyMap.h
   cmSourceFile.cxx
   cmSourceFile.h
   cmSourceGroup.cxx