diff --git a/spine-c/src/spine/SkeletonJson.c b/spine-c/src/spine/SkeletonJson.c
index 3c3cdf307..3f426ec41 100644
--- a/spine-c/src/spine/SkeletonJson.c
+++ b/spine-c/src/spine/SkeletonJson.c
@@ -569,7 +569,8 @@ spSkeletonData* spSkeletonJson_readSkeletonData (spSkeletonJson* self, const cha
 	CONST_CAST(char*, self->error) = 0;
 	internal->linkedMeshCount = 0;
 
-	oldLocale = setlocale(LC_NUMERIC, "C");
+	oldLocale = setlocale(LC_NUMERIC, NULL);
+	setlocale(LC_NUMERIC, "C");
 	root = Json_create(json);
 	setlocale(LC_NUMERIC, oldLocale);
 	if (!root) {