diff -Naruw postgis-2.1.0.orig/configure.ac postgis-2.1.0/configure.ac
--- postgis-2.1.0.orig/configure.ac	2013-07-09 03:36:15.000000000 +0000
+++ postgis-2.1.0/configure.ac	2013-08-18 18:14:23.263697970 +0000
@@ -896,7 +852,7 @@
 CPPFLAGS="$PGSQL_CPPFLAGS $GEOS_CPPFLAGS $PROJ_CPPFLAGS $XML2_CPPFLAGS $SFCGAL_CPPFLAGS $CPPFLAGS"
 AC_MSG_RESULT([CPPFLAGS: $CPPFLAGS])
 
-SHLIB_LINK="$PGSQL_LDFLAGS $GEOS_LDFLAGS $PROJ_LDFLAGS -lgeos_c -lproj $JSON_LDFLAGS $XML2_LDFLAGS $SFCGAL_LDFLAGS"
+SHLIB_LINK="$PGSQL_LDFLAGS $GEOS_LDFLAGS $PROJ_LDFLAGS -lgeos_c -lproj $JSON_LIBS $XML2_LDFLAGS $SFCGAL_LDFLAGS"
 AC_SUBST([SHLIB_LINK])
 dnl AC_MSG_RESULT([SHLIB_LINK: $SHLIB_LINK])
 
diff -Naruw postgis-2.1.0.orig/liblwgeom/lwin_geojson.c postgis-2.1.0/liblwgeom/lwin_geojson.c
--- postgis-2.1.0.orig/liblwgeom/lwin_geojson.c	2013-02-28 17:42:49.000000000 +0000
+++ postgis-2.1.0/liblwgeom/lwin_geojson.c	2013-08-18 18:11:52.473943571 +0000
@@ -17,8 +17,8 @@
 
 #ifdef HAVE_LIBJSON
 
-#include <json/json.h>
-#include <json/json_object_private.h>
+#include <json.h>
+#include <json_object_private.h>
 #include <string.h>
 
 static void geojson_lwerror(char *msg, int error_code)
@@ -551,5 +551,3 @@
   return lwgeom;
 #endif /* HAVE_LIBJSON  */
 }
-
-
diff -Naruw postgis-2.1.0.orig/liblwgeom/Makefile.in postgis-2.1.0/liblwgeom/Makefile.in
--- postgis-2.1.0.orig/liblwgeom/Makefile.in	2013-05-09 19:38:17.000000000 +0000
+++ postgis-2.1.0/liblwgeom/Makefile.in	2013-08-18 18:11:52.477943594 +0000
@@ -11,8 +11,8 @@
 # **********************************************************************
 
 CC = @CC@
-CFLAGS = @CFLAGS@ @PICFLAGS@ @WARNFLAGS@ @GEOS_CPPFLAGS@ @PROJ_CPPFLAGS@ @JSON_CPPFLAGS@
-LDFLAGS = @LDFLAGS@ @GEOS_LDFLAGS@ -lgeos_c @PROJ_LDFLAGS@ -lproj @JSON_LDFLAGS@
+CFLAGS = @CFLAGS@ @PICFLAGS@ @WARNFLAGS@ @GEOS_CPPFLAGS@ @PROJ_CPPFLAGS@ @JSON_CFLAGS@
+LDFLAGS = @LDFLAGS@ @GEOS_LDFLAGS@ -lgeos_c @PROJ_LDFLAGS@ -lproj @JSON_LIBS@
 NUMERICFLAGS = @NUMERICFLAGS@
 top_builddir = @top_builddir@
 prefix = @prefix@
--- postgis-2.1.2/configure.ac.orig	2014-05-13 17:00:47.872142350 -0400
+++ postgis-2.1.2/configure.ac	2014-05-13 17:03:11.875872150 -0400
@@ -749,67 +749,22 @@
 dnl Detect if json-c installed
 dnl ===========================================================================
 
-CHECK_JSON=yes
-HAVE_JSON=no
-
-AC_ARG_WITH([json],
-	[AS_HELP_STRING([--without-json], [build without json-c support])],
-	[CHECK_JSON="$withval"], [])
-
-if test "$CHECK_JSON" != "no"; then dnl {
-
-AC_ARG_WITH([jsondir],
-	[AS_HELP_STRING([--with-jsondir=PATH], [specify the json-c installation directory])],
-	[JSONDIR="$withval"], [JSONDIR=])
-
-if test ! "x$JSONDIR" = "x"; then
-	dnl Make sure that the directory exists
-	if test "x$JSONDIR" = "xyes"; then
-		AC_MSG_ERROR([you must specify a parameter to --with-jsondir, e.g. --with-jsondir=/path/to])
-	else
-		dnl We need (libjson.so OR libjson.a OR libjson.dll) AND json/json.h
-		if test ! -e "${JSONDIR}/include/json/json.h" -o \
-		        ! \( -e "${JSONDIR}/lib/libjson.so" -o \
-		            -e "${JSONDIR}/lib/libjson.dll" -o \
-		            -e "${JSONDIR}/lib/libjson.dylib" -o \
-		            -e "${JSONDIR}/bin/libjson.dll" -o \
-		            -e "${JSONDIR}/lib/libjson.a" \) 
-		then
-			AC_MSG_ERROR([Cannot find json dev files in "$JSONDIR"])
-		fi
-		AC_MSG_RESULT([Using user-specified json-c directory: $JSONDIR])
-
-		dnl Add the include directory to JSON_CPPFLAGS
-		JSON_CPPFLAGS="-I$JSONDIR/include"
-		JSON_LDFLAGS="-L$JSONDIR/lib"
-	fi
-fi
-
-dnl Check that we can find the json/json.h header file
-CPPFLAGS_SAVE="$CPPFLAGS"
-CPPFLAGS="$JSON_CPPFLAGS"
-AC_CHECK_HEADER([json-c/json.h], [HAVE_JSON=yes], [
-  AC_CHECK_HEADER([json/json.h], [HAVE_JSON=yes], [])])	
-CPPFLAGS="$CPPFLAGS_SAVE"
-
-dnl Ensure we can link against libjson
-LIBS_SAVE="$LIBS"
-LIBS="$JSON_LDFLAGS"
-AC_CHECK_LIB([json-c], [json_object_get], [HAVE_JSON=yes; JSON_LDFLAGS="${JSON_LDFLAGS} -ljson-c"], [
-  AC_CHECK_LIB([json], [json_object_get], [HAVE_JSON=yes; JSON_LDFLAGS="${JSON_LDFLAGS} -ljson"], [], [])
-], [])
-LIBS="$LIBS_SAVE"
-
-if test "$HAVE_JSON" = "yes"; then
+PKG_CHECK_MODULES([JSON], [json],
+                  [
+                      HAVE_JSON=yes
 	AC_DEFINE([HAVE_LIBJSON], 1, [Define to 1 if libjson is present])
-fi
+                  ],
+                  [
+                      PKG_CHECK_MODULES([JSON], [json-c],
+                      [
+                          HAVE_JSON=yes
+	                  AC_DEFINE([HAVE_LIBJSON], 1, [Define to 1 if libjson is present])
+                      ],
+                      [HAVE_JSON=no])
+                  ])
 
-AC_SUBST([JSON_CPPFLAGS])
-AC_SUBST([JSON_LDFLAGS])
 AC_SUBST([HAVE_JSON])
 
-fi dnl }
-
 dnl ===========================================================================
 dnl Detect GTK+2.0 for GUI
 dnl ===========================================================================