--- a/Source/cmLocalGenerator.cxx
+++ b/Source/cmLocalGenerator.cxx
@@ -1329,7 +1329,9 @@ std::string cmLocalGenerator::GetIncludeFlags(
 void cmLocalGenerator::GetIncludeDirectories(std::vector<std::string>& dirs,
                                              cmGeneratorTarget* target,
                                              const char* lang,
-                                             const char *config)
+                                             const char *config,
+                                             bool stripImplicitInclDirs
+                                            )
 {
   // Need to decide whether to automatically include the source and
   // binary directories at the beginning of the include path.
@@ -1404,18 +1406,21 @@ void cmLocalGenerator::GetIncludeDirectories(std::vector<std::string>& dirs,
     return;
     }
 
-  // Load implicit include directories for this language.
-  std::string impDirVar = "CMAKE_";
-  impDirVar += lang;
-  impDirVar += "_IMPLICIT_INCLUDE_DIRECTORIES";
-  if(const char* value = this->Makefile->GetDefinition(impDirVar.c_str()))
+  if (stripImplicitInclDirs)
     {
-    std::vector<std::string> impDirVec;
-    cmSystemTools::ExpandListArgument(value, impDirVec);
-    for(std::vector<std::string>::const_iterator i = impDirVec.begin();
-        i != impDirVec.end(); ++i)
+    // Load implicit include directories for this language.
+    std::string impDirVar = "CMAKE_";
+    impDirVar += lang;
+    impDirVar += "_IMPLICIT_INCLUDE_DIRECTORIES";
+    if(const char* value = this->Makefile->GetDefinition(impDirVar.c_str()))
       {
-      emitted.insert(*i);
+      std::vector<std::string> impDirVec;
+      cmSystemTools::ExpandListArgument(value, impDirVec);
+      for(std::vector<std::string>::const_iterator i = impDirVec.begin();
+          i != impDirVec.end(); ++i)
+        {
+        emitted.insert(*i);
+        }
       }
     }
 
--- a/Source/cmLocalGenerator.h
+++ b/Source/cmLocalGenerator.h
@@ -212,7 +212,8 @@ public:
   /** Get the include flags for the current makefile and language.  */
   void GetIncludeDirectories(std::vector<std::string>& dirs,
                              cmGeneratorTarget* target,
-                             const char* lang = "C", const char *config = 0);
+                             const char* lang = "C", const char *config = 0,
+                             bool stripImplicitInclDirs = true);
 
   /** Compute the language used to compile the given source file.  */
   const char* GetSourceFileLanguage(const cmSourceFile& source);
--- a/Source/cmQtAutomoc.cxx
+++ b/Source/cmQtAutomoc.cxx
@@ -212,36 +212,11 @@ void cmQtAutomoc::SetupAutomocTarget(cmTarget* target)
     }
 
 
-  const char* qtIncDir = 0;
-  const char* qtCoreIncDir = 0;
-
-  // check whether ${QT_INCLUDE_DIR} is part of the implicit include dirs,
-  // see http://public.kitware.com/Bug/view.php?id=13667
-  bool qtIncludeDirMayHaveBeenRemoved = false;
-  if (makefile->IsSet("QT_INCLUDE_DIR"))
-    {
-    qtIncDir = makefile->GetDefinition("QT_INCLUDE_DIR");
-    std::string s =
-         makefile->GetSafeDefinition("CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES");
-    std::vector<std::string> implIncDirs;
-    cmSystemTools::ExpandListArgument(s, implIncDirs);
-    if (std::find(implIncDirs.begin(), implIncDirs.end(),std::string(qtIncDir))
-                                                          != implIncDirs.end())
-      {
-      qtIncludeDirMayHaveBeenRemoved = true;
-      if (makefile->IsSet("QT_QTCORE_INCLUDE_DIR"))
-        {
-        qtCoreIncDir = makefile->GetDefinition("QT_QTCORE_INCLUDE_DIR");
-        }
-      }
-    }
-
-  bool haveQtCoreIncDir = false;
-  bool haveQtIncDir = false;
-
   std::vector<std::string> includeDirs;
   cmGeneratorTarget gtgt(target);
-  localGen->GetIncludeDirectories(includeDirs, &gtgt, "CXX");
+  // Get the include dirs for this target, without stripping the implicit
+  // include dirs off, see http://public.kitware.com/Bug/view.php?id=13667
+  localGen->GetIncludeDirectories(includeDirs, &gtgt, "CXX", 0, false);
   std::string _moc_incs = "";
   const char* sep = "";
   for(std::vector<std::string>::const_iterator incDirIt = includeDirs.begin();
@@ -251,37 +226,6 @@ void cmQtAutomoc::SetupAutomocTarget(cmTarget* target)
     _moc_incs += sep;
     sep = ";";
     _moc_incs += *incDirIt;
-
-    if (qtIncludeDirMayHaveBeenRemoved && qtCoreIncDir && qtIncDir) // #13667
-      {
-      if (*incDirIt == qtIncDir)
-        {
-        haveQtIncDir = true;
-        qtIncludeDirMayHaveBeenRemoved = false; // it's here, i.e. not removed
-        }
-      if (*incDirIt == qtCoreIncDir)
-        {
-        haveQtCoreIncDir = true;
-        }
-      }
-    }
-
-  // Some projects (kdelibs, phonon) query the compiler for its default
-  // include search dirs, and add those to
-  // CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES.
-  // These may include e.g./usr/lib/qt/include . This is typically also part
-  // of ${QT_INCLUDES}. If this directory is then contained in the implicit
-  // include dirs, it is removed from the include dirs returned from the
-  // target above. So we add ${QT_INCLUDE_DIR} manually for moc if we detected
-  // that ${QT_QTCORE_INCLUDE_DIR} is among the include dirs (there shouldn't
-  // be a way to use Qt4 without using ${QT_QTCORE_INCLUDE_DIR} I think.
-  // See #13646 and #13667.
-  if (qtIncludeDirMayHaveBeenRemoved && qtCoreIncDir && qtIncDir
-      && (haveQtCoreIncDir == true) && (haveQtIncDir == false))
-    {
-    _moc_incs += sep;
-    sep = ";";
-    _moc_incs += qtIncDir;
     }
 
   const char* tmp = target->GetProperty("COMPILE_DEFINITIONS");
-- 
1.7.0