diff --git a/ndn-cpp/c/interest.h b/ndn-cpp/c/interest.h
index af067a3..801466a 100644
--- a/ndn-cpp/c/interest.h
+++ b/ndn-cpp/c/interest.h
@@ -81,6 +81,8 @@
 enum {
   ndn_Interest_CHILD_SELECTOR_LEFT = 0,
   ndn_Interest_CHILD_SELECTOR_RIGHT = 1,
+
+  ndn_Interest_ANSWER_NO_CONTENT_STORE = 0,
   ndn_Interest_ANSWER_CONTENT_STORE = 1,
   ndn_Interest_ANSWER_GENERATED = 2,
   ndn_Interest_ANSWER_STALE = 4,    // Stale answer OK