diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx
index e1642cc95e..825f3ebcf3 100644
--- a/Source/cmTarget.cxx
+++ b/Source/cmTarget.cxx
@@ -60,16 +60,6 @@ const char* cmTarget::GetTargetTypeName(TargetType targetType)
   return 0;
 }
 
-//----------------------------------------------------------------------------
-struct cmTarget::OutputInfo
-{
-  std::string OutDir;
-  std::string ImpDir;
-  std::string PdbDir;
-  bool empty() const
-    { return OutDir.empty() && ImpDir.empty() && PdbDir.empty(); }
-};
-
 //----------------------------------------------------------------------------
 class cmTargetInternals
 {
diff --git a/Source/cmTarget.h b/Source/cmTarget.h
index aab9582bb6..96cdb5e21a 100644
--- a/Source/cmTarget.h
+++ b/Source/cmTarget.h
@@ -488,7 +488,15 @@ private:
 #endif
 
   // Cache target output paths for each configuration.
-  struct OutputInfo;
+  struct OutputInfo
+  {
+    std::string OutDir;
+    std::string ImpDir;
+    std::string PdbDir;
+    bool empty() const
+     { return OutDir.empty() && ImpDir.empty() && PdbDir.empty(); }
+  };
+
   OutputInfo const* GetOutputInfo(const std::string& config) const;
   bool
   ComputeOutputDir(const std::string& config,