diff --git a/Source/cmLocalUnixMakefileGenerator.cxx b/Source/cmLocalUnixMakefileGenerator.cxx
index b06ba293d..4344de423 100644
--- a/Source/cmLocalUnixMakefileGenerator.cxx
+++ b/Source/cmLocalUnixMakefileGenerator.cxx
@@ -22,7 +22,6 @@
 #include "cmMakeDepend.h"
 #include "cmCacheManager.h"
 #include "cmGeneratedFileStream.h"
-#include "cmSubDirectory.h"
 
 #include <cmsys/RegularExpression.hxx>
 
diff --git a/Source/cmLocalUnixMakefileGenerator.h b/Source/cmLocalUnixMakefileGenerator.h
index 19dbe756f..04536515c 100644
--- a/Source/cmLocalUnixMakefileGenerator.h
+++ b/Source/cmLocalUnixMakefileGenerator.h
@@ -23,7 +23,6 @@ class cmDependInformation;
 class cmMakeDepend;
 class cmTarget;
 class cmSourceFile;
-class cmSubDirectory;
 
 /** \class cmLocalUnixMakefileGenerator
  * \brief Write a LocalUnix makefiles.