diff --git a/config.h.cmake b/config.h.cmake
index f74e7825..0685f10c 100644
--- a/config.h.cmake
+++ b/config.h.cmake
@@ -17,6 +17,9 @@
 /* Define to 1 if you have the <argp.h> header file. */
 #cmakedefine HAVE_ARGP_H 1
 
+/* Define to 1 if you have the <aprpa/inet.h> header file. */
+#cmakedefine HAVE_ARPA_INET_H 1
+
 /* Define to 1 if you have the <pty.h> header file. */
 #cmakedefine HAVE_PTY_H 1