diff --git a/CHANGES b/CHANGES
index d51199b117..33888a2f87 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+4133.	[port]		Update how various json libraries are handled.
+			[RT #39646]
+
 4132.	[cleanup]	dig: added +rd as a synonym for +recurse,
 			added +class as an unabbreviated alternative
 			to +cl. [RT #39686]
diff --git a/bin/named/statschannel.c b/bin/named/statschannel.c
index 4e5d31fd34..2b4ffbb88b 100644
--- a/bin/named/statschannel.c
+++ b/bin/named/statschannel.c
@@ -20,6 +20,7 @@
 
 #include <isc/buffer.h>
 #include <isc/httpd.h>
+#include <isc/json.h>
 #include <isc/mem.h>
 #include <isc/once.h>
 #include <isc/print.h>
@@ -42,10 +43,6 @@
 #include <named/server.h>
 #include <named/statschannel.h>
 
-#ifdef HAVE_JSON_H
-#include <json/json.h>
-#endif
-
 #include "bind9.xsl.h"
 
 struct ns_statschannel {
diff --git a/config.h.in b/config.h.in
index 3f35e2e1f3..594518851c 100644
--- a/config.h.in
+++ b/config.h.in
@@ -260,6 +260,9 @@ int sigwait(const unsigned int *set, int *sig);
 /* Define if libjson was found */
 #undef HAVE_JSON
 
+/* Define if json-c was found */
+#undef HAVE_JSON_C
+
 /* Define to 1 if you have the <kerberosv5/krb5.h> header file. */
 #undef HAVE_KERBEROSV5_KRB5_H
 
diff --git a/configure b/configure
index 3c8132d316..75cf58444d 100755
--- a/configure
+++ b/configure
@@ -16599,6 +16599,7 @@ fi
 
 
 have_libjson=""
+have_libjson_c=""
 case "$use_libjson" in
 	no)
 		libjson_libs=""
@@ -16608,34 +16609,36 @@ case "$use_libjson" in
 		do
 			if test -f "${d}/include/json/json.h"
 			then
-				libjson_cflags="-I ${d}/include/json"
 				if test ${d} != /usr
 				then
+					libjson_cflags="-I ${d}/include"
 					LIBS="$LIBS -L${d}/lib"
 				fi
 				have_libjson="yes"
 			elif test -f "${d}/include/json-c/json.h"
 			then
-				libjson_cflags="-I ${d}/include/json-c"
 				if test ${d} != /usr
 				then
+					libjson_cflags="-I ${d}/include"
 					LIBS="$LIBS -L${d}/lib"
 				fi
 				have_libjson="yes"
+				have_libjson_c="yes"
 			fi
 		done
 		;;
 	*)
 		if test -f "${use_libjson}/include/json/json.h"
 		then
-			libjson_cflags="-I${use_libjson}/include/json"
+			libjson_cflags="-I${use_libjson}/include"
 			LIBS="$LIBS -L${use_libjson}/lib"
 			have_libjson="yes"
 		elif test -f "${use_libjson}/include/json-c/json.h"
 		then
-			libjson_cflags="-I${use_libjson}/include/json-c"
+			libjson_cflags="-I${use_libjson}/include"
 			LIBS="$LIBS -L${use_libjson}/lib"
 			have_libjson="yes"
+			have_libjson_c="yes"
 		else
 			as_fn_error $? "$use_libjson/include/json{,-c}/json.h not found." "$LINENO" 5
 		fi
@@ -16719,6 +16722,12 @@ then
 
 $as_echo "#define HAVE_JSON 1" >>confdefs.h
 
+	if test "X${have_libjson_c}" = Xyes
+	then
+
+$as_echo "#define HAVE_JSON_C 1" >>confdefs.h
+
+	fi
 fi
 
 #
diff --git a/configure.in b/configure.in
index 95ad0e2a01..f6393ab39e 100644
--- a/configure.in
+++ b/configure.in
@@ -2150,6 +2150,7 @@ AC_ARG_WITH(libjson,
     use_libjson="$withval", use_libjson="auto")
 
 have_libjson=""
+have_libjson_c=""
 case "$use_libjson" in
 	no)
 		libjson_libs=""
@@ -2159,34 +2160,36 @@ case "$use_libjson" in
 		do
 			if test -f "${d}/include/json/json.h"
 			then
-				libjson_cflags="-I ${d}/include/json"
 				if test ${d} != /usr
 				then
+					libjson_cflags="-I ${d}/include"
 					LIBS="$LIBS -L${d}/lib"
 				fi
 				have_libjson="yes"
 			elif test -f "${d}/include/json-c/json.h"
 			then
-				libjson_cflags="-I ${d}/include/json-c"
 				if test ${d} != /usr
 				then
+					libjson_cflags="-I ${d}/include"
 					LIBS="$LIBS -L${d}/lib"
 				fi
 				have_libjson="yes"
+				have_libjson_c="yes"
 			fi
 		done
 		;;
 	*)
 		if test -f "${use_libjson}/include/json/json.h"
 		then
-			libjson_cflags="-I${use_libjson}/include/json"
+			libjson_cflags="-I${use_libjson}/include"
 			LIBS="$LIBS -L${use_libjson}/lib"
 			have_libjson="yes"
 		elif test -f "${use_libjson}/include/json-c/json.h"
 		then
-			libjson_cflags="-I${use_libjson}/include/json-c"
+			libjson_cflags="-I${use_libjson}/include"
 			LIBS="$LIBS -L${use_libjson}/lib"
 			have_libjson="yes"
+			have_libjson_c="yes"
 		else
 			AC_MSG_ERROR([$use_libjson/include/json{,-c}/json.h not found.])
 		fi
@@ -2210,6 +2213,10 @@ if test "X${have_libjson}" != "X"
 then
 	CFLAGS="$CFLAGS $libjson_cflags"
 	AC_DEFINE(HAVE_JSON, 1, [Define if libjson was found])
+	if test "X${have_libjson_c}" = Xyes
+	then
+		AC_DEFINE(HAVE_JSON_C, 1, [Define if json-c was found])
+	fi
 fi
 
 #
diff --git a/lib/isc/include/isc/json.h b/lib/isc/include/isc/json.h
index 69ac4ffa18..2d779fd1ae 100644
--- a/lib/isc/include/isc/json.h
+++ b/lib/isc/include/isc/json.h
@@ -17,6 +17,7 @@
 #ifndef ISC_JSON_H
 #define ISC_JSON_H 1
 
+#ifdef HAVE_JSON
 /*
  * This file is here mostly to make it easy to add additional libjson header
  * files as needed across all the users of this file.  Rather than place
@@ -24,9 +25,21 @@
  * the ifdef as well as adding the ability to add additional functions
  * which may be useful.
  */
-
-#ifdef HAVE_JSON
-#include <json.h>
+#ifdef HAVE_JSON_C
+/*
+ * We don't include <json-c/json.h> as the subsequent includes do not
+ * prefix the header file names with "json-c/" and using
+ * -I <prefix>/include/json-c results in too many filename collisions.
+ */
+#include <json-c/linkhash.h>
+#include <json-c/json_util.h>
+#include <json-c/json_object.h>
+#include <json-c/json_tokener.h>
+#include <json-c/json_object_iterator.h>
+#include <json-c/json_c_version.h>
+#else
+#include <json/json.h>
+#endif
 #endif
 
 #define ISC_JSON_RENDERCONFIG		0x00000001 /* render config data */