diff --git a/src/dpp/dns.cpp b/src/dpp/dns.cpp
index a0f106db..3bdd8ce5 100644
--- a/src/dpp/dns.cpp
+++ b/src/dpp/dns.cpp
@@ -25,6 +25,7 @@
 #include <mutex>
 #include <shared_mutex>
 #include <dpp/exception.h>
+#include <cstring>
 
 namespace dpp
 {
@@ -97,4 +98,4 @@ namespace dpp
                        return cache_entry;
                }
        }
-};
\ No newline at end of file
+};