diff --git a/bro-config.h.in b/bro-config.h.in
index 0937950604..290dd31cae 100644
--- a/bro-config.h.in
+++ b/bro-config.h.in
@@ -23,6 +23,9 @@
 /* Define if you have the <memory.h> header file. */
 #cmakedefine HAVE_MEMORY_H
 
+/* Define if you have the <netinet/ether.h> header file */
+#cmakedefine HAVE_NETINET_ETHER_H
+
 /* Define if you have the <netinet/if_ether.h> header file. */
 #cmakedefine HAVE_NETINET_IF_ETHER_H
 
diff --git a/src/Conn.h b/src/Conn.h
index 7609d831b6..e078c763d7 100644
--- a/src/Conn.h
+++ b/src/Conn.h
@@ -3,6 +3,8 @@
 #ifndef conn_h
 #define conn_h
 
+#include "bro-config.h"
+
 #ifdef HAVE_NETINET_ETHER_H
 #include <netinet/ether.h>
 #endif