diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index 62904121d..818bb1b81 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -1659,30 +1659,6 @@ void cmMakefile::AddIncludeDirectory(const char* inc, bool before)
     }
 }
 
-//----------------------------------------------------------------------------
-std::vector<std::string> cmMakefile::GetIncludeDirectories()
-{
-  std::vector<std::string> includes;
-  const char *val = this->GetProperty("INCLUDE_DIRECTORIES");
-  if(val)
-    {
-    cmSystemTools::ExpandListArgument(val, includes);
-    }
-
-  std::set<std::string> uniqueIncludes;
-  std::vector<std::string> orderedAndUniqueIncludes;
-  for(std::vector<std::string>::const_iterator
-      li = includes.begin(); li != includes.end(); ++li)
-    {
-    if(uniqueIncludes.insert(*li).second)
-      {
-      orderedAndUniqueIncludes.push_back(*li);
-      }
-    }
-
-  return orderedAndUniqueIncludes;
-}
-
 //----------------------------------------------------------------------------
 void cmMakefile::AddSystemIncludeDirectory(const char* dir)
 {
diff --git a/Source/cmMakefile.h b/Source/cmMakefile.h
index 5e5310f91..c2939fb81 100644
--- a/Source/cmMakefile.h
+++ b/Source/cmMakefile.h
@@ -521,11 +521,6 @@ public:
       returned may be imported or built within the project.  */
   cmTarget* FindTargetToUse(const char* name);
 
-  /**
-   * Get a list of include directories in the build.
-   */
-  std::vector<std::string> GetIncludeDirectories();
-
   /**
    * Mark include directories as system directories.
    */