diff --git a/lib/krb5.c b/lib/krb5.c
index 517491c465..07d21903d6 100644
--- a/lib/krb5.c
+++ b/lib/krb5.c
@@ -41,6 +41,9 @@
 #ifdef HAVE_NETDB_H
 #include <netdb.h>
 #endif
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
 
 #include "urldata.h"
 #include "curl_base64.h"
diff --git a/lib/noproxy.c b/lib/noproxy.c
index 81f1e09934..3409dab6f6 100644
--- a/lib/noproxy.c
+++ b/lib/noproxy.c
@@ -34,6 +34,10 @@
 #include <netinet/in.h>
 #endif
 
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+
 /*
  * Curl_cidr4_match() returns TRUE if the given IPv4 address is within the
  * specified CIDR address range.