diff --git a/tools/ndncert-ca-server.cpp b/tools/ndncert-ca-server.cpp
index 00cd3aa..17bf0f0 100644
--- a/tools/ndncert-ca-server.cpp
+++ b/tools/ndncert-ca-server.cpp
@@ -83,7 +83,7 @@
   terminateSignals.add(SIGTERM);
   terminateSignals.async_wait(handleSignal);
 
-  std::string configFilePath(SYSCONFDIR "/ndncert/ca.conf");
+  std::string configFilePath(NDNCERT_SYSCONFDIR "/ndncert/ca.conf");
   bool wantRepoOut = false;
 
   namespace po = boost::program_options;