Source/cmVisualStudio10TargetGenerator.cxx | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/Source/cmVisualStudio10TargetGenerator.cxx b/Source/cmVisualStudio10TargetGenerator.cxx
index 1e37ca5..c880ff9 100644
--- a/Source/cmVisualStudio10TargetGenerator.cxx
+++ b/Source/cmVisualStudio10TargetGenerator.cxx
@@ -871,10 +871,18 @@ void cmVisualStudio10TargetGenerator::WriteAllSources()
         si = this->GeneratorTarget->ExternalObjects.begin();
       si != this->GeneratorTarget->ExternalObjects.end(); ++si)
     {
-    // If an object file is generated in this target, then vs10 will use
-    // it in the build, and we have to list it as None instead of Object.
-    std::vector<cmSourceFile*> const* d = this->Target->GetSourceDepends(*si);
-    this->WriteSource((d && !d->empty())? "None":"Object", *si);
+        // if we mark an object file as external, set it as Object
+        if ((*si)->GetPropertyAsBool("EXTERNAL_OBJECT"))
+        {
+            this->WriteSource("Object", *si);
+        }
+        else
+        {
+            // If an object file is generated in this target, then vs10 will use
+            // it in the build, and we have to list it as None instead of Object.
+            std::vector<cmSourceFile*> const* d = this->Target->GetSourceDepends(*si);
+            this->WriteSource((d && !d->empty())? "None":"Object", *si);
+        }
     }

   this->WriteSources("None", this->GeneratorTarget->ExtraSources);