diff --git a/configure.ac b/configure.ac
index e188bc900..ad40ede97 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1038,6 +1038,9 @@ dnl default includes
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
 #endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
 ]
 )
 
diff --git a/lib/connect.c b/lib/connect.c
index 77bcb56d1..78338de65 100644
--- a/lib/connect.c
+++ b/lib/connect.c
@@ -32,10 +32,15 @@
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
 #endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h> /* <netinet/tcp.h> may need it */
+#endif
 #ifdef HAVE_NETINET_TCP_H
 #include <netinet/tcp.h> /* for TCP_NODELAY */
 #endif
+#ifdef HAVE_SYS_IOCTL_H
 #include <sys/ioctl.h>
+#endif
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif