diff --git a/message_cache.cc b/message_cache.cc
index 9d15865..eaa65d4 100644
--- a/message_cache.cc
+++ b/message_cache.cc
@@ -1,4 +1,6 @@
 #include "message_cache.hh"
+#include <cassert>
+#include <cstring>
 
 pEp::MessageCache pEp::message_cache;