diff --git a/build/cmake/config.h.in b/build/cmake/config.h.in
index a3d6642..afcdc1e 100644
--- a/build/cmake/config.h.in
+++ b/build/cmake/config.h.in
@@ -131,7 +131,10 @@
 #cmakedefine HAVE_SCHED_H 1
 
 /* Define to 1 if you have the <strings.h> header file. */
-#define HAVE_STRINGS_H 1
+#cmakedefine HAVE_STRINGS_H 1
+
+/* Define to 1 if you have the <afunix.h> header file. */
+#cmakedefine HAVE_AF_UNIX_H 1
 
 /*************************** FUNCTIONS ***************************/