diff --git a/ndn-cpp/security/identity/osx-private-key-storage.cpp b/ndn-cpp/security/identity/osx-private-key-storage.cpp
index 2840e64..3efc99b 100644
--- a/ndn-cpp/security/identity/osx-private-key-storage.cpp
+++ b/ndn-cpp/security/identity/osx-private-key-storage.cpp
@@ -5,7 +5,7 @@
  * See COPYING for copyright and distribution information.
  */
 
-// Only compile if config.h defines HAVE_OSX_SECKEYCHAIN 1.
+// Only compile if ndn-cpp-config.h defines HAVE_OSX_SECKEYCHAIN 1.
 #include "../../c/common.h"
 #if 0 // temporarily disable.
 //#if HAVE_OSX_SECKEYCHAIN