diff --git a/bufferevent-internal.h b/bufferevent-internal.h
index 0b73d920..c84f09c0 100644
--- a/bufferevent-internal.h
+++ b/bufferevent-internal.h
@@ -44,6 +44,9 @@ extern "C" {
 #ifdef _WIN32
 #include <ws2tcpip.h>
 #endif
+#ifdef EVENT__HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
 #ifdef EVENT__HAVE_NETINET_IN6_H
 #include <netinet/in6.h>
 #endif