diff --git a/lib/export/isc/include/isc/Makefile.in b/lib/export/isc/include/isc/Makefile.in
index 8c7eff8efa..a00f2db001 100644
--- a/lib/export/isc/include/isc/Makefile.in
+++ b/lib/export/isc/include/isc/Makefile.in
@@ -30,7 +30,7 @@ HEADERS =	app.h assertions.h base64.h bitstring.h boolean.h \
 		eventclass.h file.h formatcheck.h fsaccess.h \
 		hash.h heap.h hex.h hmacmd5.h \
 		httpd.h \
-		interfaceiter.h @ISC_IPV6_H@ iterated_hash.h lang.h lex.h \
+		interfaceiter.h @ISC_IPV6_H@ iterated_hash.h json.h lang.h lex.h \
 		lfsr.h lib.h list.h log.h \
 		magic.h md5.h mem.h msgcat.h msgs.h \
 		mutexblock.h namespace.h netaddr.h ondestroy.h os.h parseint.h \