diff --git a/Source/cmGeneratorTarget.cxx b/Source/cmGeneratorTarget.cxx
index dc399d8c8..83f9cd27a 100644
--- a/Source/cmGeneratorTarget.cxx
+++ b/Source/cmGeneratorTarget.cxx
@@ -404,7 +404,7 @@ std::string cmGeneratorTarget::GetOutputName(const std::string& config,
 
 void cmGeneratorTarget::AddSource(const std::string& src)
 {
-  this->Target->AddSource(src);
+  this->Target->AddGenerateTimeSource(src);
 }
 
 void cmGeneratorTarget::AddTracedSources(std::vector<std::string> const& srcs)
diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx
index 7fd8d86a4..16378cc21 100644
--- a/Source/cmTarget.cxx
+++ b/Source/cmTarget.cxx
@@ -960,6 +960,11 @@ cmSourceFile* cmTarget::AddSource(const std::string& src)
   return this->Makefile->GetOrCreateSource(src);
 }
 
+void cmTarget::AddGenerateTimeSource(const std::string& src)
+{
+  this->AddSource(src);
+}
+
 //----------------------------------------------------------------------------
 void cmTarget::MergeLinkLibraries( cmMakefile& mf,
                                    const std::string& selfname,
diff --git a/Source/cmTarget.h b/Source/cmTarget.h
index 3e71dbd1a..cbf2ca95c 100644
--- a/Source/cmTarget.h
+++ b/Source/cmTarget.h
@@ -145,6 +145,7 @@ public:
   void AddTracedSources(std::vector<std::string> const& srcs);
   cmSourceFile* AddSourceCMP0049(const std::string& src);
   cmSourceFile* AddSource(const std::string& src);
+  void AddGenerateTimeSource(const std::string& src);
 
   enum LinkLibraryType {GENERAL, DEBUG, OPTIMIZED};