diff --git a/3party/jansson/src/jansson_config.h b/3party/jansson/src/jansson_config.h
index e576cd1a0b..ce5b240443 100644
--- a/3party/jansson/src/jansson_config.h
+++ b/3party/jansson/src/jansson_config.h
@@ -34,6 +34,6 @@
 
 /* If locale.h and localeconv() are available, define to 1,
    otherwise to 0. */
-#define JSON_HAVE_LOCALECONV 1
+#define JSON_HAVE_LOCALECONV 0
 
 #endif