diff --git a/src/profile.h b/src/profile.h
index b020408..7a65553 100644
--- a/src/profile.h
+++ b/src/profile.h
@@ -26,7 +26,7 @@
 public:
   Profile() {}
 
-  Profile(ndn::security::IdentityCertificate& identityCertificate);
+  Profile(const ndn::security::IdentityCertificate& identityCertificate);
 
   Profile(const ndn::Name& identityName);