diff --git a/modules/dav/main/props.c b/modules/dav/main/props.c
index 58b369c000..848bc9ba73 100644
--- a/modules/dav/main/props.c
+++ b/modules/dav/main/props.c
@@ -184,6 +184,9 @@
 #if APR_HAVE_STDIO_H
 #include <stdio.h>              /* for sprintf() */
 #endif
+#if APR_HAVE_ARPA_INET_H
+#include <arpa/inet.h>          /* for ntohs(), htons() */
+#endif
 
 #include "mod_dav.h"
 
diff --git a/server/vhost.c b/server/vhost.c
index f82c986e18..ab4aa7712d 100644
--- a/server/vhost.c
+++ b/server/vhost.c
@@ -77,6 +77,10 @@
 #include "http_protocol.h"
 #include "http_core.h"
 
+#if APR_HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+
 /*
  * After all the definitions there's an explanation of how it's all put
  * together.