diff --git a/smtk/attribute/CMakeLists.txt b/smtk/attribute/CMakeLists.txt
index 7e0936e4c95956f3e20c1ad4d8187683e6d40a5f..0bf5d043788e7dfd84e3631f020daefb36c9b30f 100644
--- a/smtk/attribute/CMakeLists.txt
+++ b/smtk/attribute/CMakeLists.txt
@@ -116,6 +116,7 @@ set(attributeHeaders
   SearchStyle.h
   StringItem.h
   StringItemDefinition.h
+  Tag.h
   ValueItem.h
   ValueItemDefinition.h
   ValueItemDefinitionTemplate.h
diff --git a/smtk/common/CMakeLists.txt b/smtk/common/CMakeLists.txt
index fb093be3f4e48ba718a0c23f74ed1aad2119a875..37946e2422e647236b72624e23d309afc28c61af 100644
--- a/smtk/common/CMakeLists.txt
+++ b/smtk/common/CMakeLists.txt
@@ -31,6 +31,7 @@ set(commonHeaders
   Paths.h
   RangeDetector.h
   Registry.h
+  Singleton.h
   StringUtil.h
   TimeZone.h
   TypeName.h
diff --git a/smtk/operation/CMakeLists.txt b/smtk/operation/CMakeLists.txt
index d1831b52624f0e1870f8c8ce3f6f853191fe89ac..2395bf82eeb8017b1699820e53d3f9e95fde9853 100644
--- a/smtk/operation/CMakeLists.txt
+++ b/smtk/operation/CMakeLists.txt
@@ -32,6 +32,7 @@ set(operationHeaders
   Operation.h
   Registrar.h
   ResourceManagerOperation.h
+  SpecificationOps.h
   XMLOperation.h
 
   groups/CreatorGroup.h