diff --git a/http.c b/http.c
index 3b947aae..9c1481e6 100644
--- a/http.c
+++ b/http.c
@@ -56,6 +56,9 @@
 #ifdef _EVENT_HAVE_NETINET_IN_H
 #include <netinet/in.h>
 #endif
+#ifdef _EVENT_HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
 #ifdef _EVENT_HAVE_NETDB_H
 #include <netdb.h>
 #endif
diff --git a/sample/hello-world.c b/sample/hello-world.c
index 90df85f7..d40af529 100644
--- a/sample/hello-world.c
+++ b/sample/hello-world.c
@@ -13,6 +13,9 @@
 #include <signal.h>
 #ifndef WIN32
 #include <netinet/in.h>
+# ifdef _XOPEN_SOURCE_EXTENDED
+#  include <arpa/inet.h>
+# endif
 #include <sys/socket.h>
 #endif
 
diff --git a/sample/http-server.c b/sample/http-server.c
index f9e84d1c..e8b7b408 100644
--- a/sample/http-server.c
+++ b/sample/http-server.c
@@ -36,6 +36,9 @@
 
 #ifdef _EVENT_HAVE_NETINET_IN_H
 #include <netinet/in.h>
+# ifdef _XOPEN_SOURCE_EXTENDED
+#  include <arpa/inet.h>
+# endif
 #endif
 
 #ifdef WIN32
diff --git a/test/bench_httpclient.c b/test/bench_httpclient.c
index 19f025f1..f0888e6c 100644
--- a/test/bench_httpclient.c
+++ b/test/bench_httpclient.c
@@ -31,6 +31,9 @@
 #else
 #include <sys/socket.h>
 #include <netinet/in.h>
+# ifdef _XOPEN_SOURCE_EXTENDED
+#  include <arpa/inet.h>
+# endif
 #endif
 #include <stdlib.h>
 #include <errno.h>
diff --git a/test/regress_listener.c b/test/regress_listener.c
index 1438f3aa..44fee7f4 100644
--- a/test/regress_listener.c
+++ b/test/regress_listener.c
@@ -34,6 +34,9 @@
 #ifndef WIN32
 #include <sys/socket.h>
 #include <netinet/in.h>
+# ifdef _XOPEN_SOURCE_EXTENDED
+#  include <arpa/inet.h>
+# endif
 #include <unistd.h>
 #endif
 
diff --git a/test/test-ratelim.c b/test/test-ratelim.c
index 824434e0..edd7ae21 100644
--- a/test/test-ratelim.c
+++ b/test/test-ratelim.c
@@ -36,6 +36,9 @@
 #else
 #include <sys/socket.h>
 #include <netinet/in.h>
+# ifdef _XOPEN_SOURCE_EXTENDED
+#  include <arpa/inet.h>
+# endif
 #endif
 #include <signal.h>