diff --git a/ext/mysql/php_mysql.c b/ext/mysql/php_mysql.c
index 3020cf4f48e..237e1f74599 100644
--- a/ext/mysql/php_mysql.c
+++ b/ext/mysql/php_mysql.c
@@ -52,6 +52,9 @@
 # endif
 # include <netdb.h>
 # include <netinet/in.h>
+# if HAVE_ARPA_INET_H
+#  include <arpa/inet.h>
+# endif
 #endif
 
 #include <mysql.h>