diff --git a/configure.ac b/configure.ac
index a08fa16..161ff00 100644
--- a/configure.ac
+++ b/configure.ac
@@ -34,7 +34,7 @@ AC_PROG_CC_C99
 AC_CONFIG_HEADER(config.h)
 AC_CONFIG_HEADER(json_config.h)
 AC_HEADER_STDC
-AC_CHECK_HEADERS(fcntl.h limits.h strings.h syslog.h unistd.h [sys/cdefs.h] [sys/param.h] stdarg.h locale.h endian.h)
+AC_CHECK_HEADERS(fcntl.h limits.h strings.h syslog.h unistd.h [sys/cdefs.h] [sys/param.h] stdarg.h locale.h xlocale.h endian.h)
 AC_CHECK_HEADER(inttypes.h,[AC_DEFINE([JSON_C_HAVE_INTTYPES_H],[1],[Public define for json_inttypes.h])])
 
 # Checks for typedefs, structures, and compiler characteristics.
diff --git a/json_tokener.c b/json_tokener.c
index 0c4007c..fdee1b3 100644
--- a/json_tokener.c
+++ b/json_tokener.c
@@ -35,6 +35,9 @@
 #ifdef HAVE_LOCALE_H
 #include <locale.h>
 #endif /* HAVE_LOCALE_H */
+#ifdef HAVE_XLOCALE_H
+#include <xlocale.h>
+#endif
 
 #define jt_hexdigit(x) (((x) <= '9') ? (x) - '0' : ((x) & 7) + 9)
 
diff --git a/tests/test_locale.c b/tests/test_locale.c
index f7f481c..a3e319d 100644
--- a/tests/test_locale.c
+++ b/tests/test_locale.c
@@ -11,6 +11,9 @@
 #ifdef HAVE_LOCALE_H
 #include <locale.h>
 #endif /* HAVE_LOCALE_H */
+#ifdef HAVE_XLOCALE_H
+#include <xlocale.h>
+#endif
 
 int main(int argc, char **argv)
 {