diff -r 0ecb13118cac -r 46d8a8305948 src/json.c
--- a/src/json.c	Sun Dec 14 23:17:48 2025 +0100
+++ b/src/json.c	Mon Dec 15 19:00:51 2025 +0100
@@ -549,13 +549,9 @@
     memset(json, 0, sizeof(CxJson));
     json->allocator = allocator;
 
-    json->states.data = json->states_internal;
-    json->states.capacity = cx_nmemb(json->states_internal);
+    cx_array_init_fixed(json->states, json->states_internal, 1);
     json->states.data[0] = JP_STATE_VALUE_BEGIN;
-    json->states.size = 1;
-
-    json->vbuf.data = json->vbuf_internal;
-    json->vbuf.capacity = cx_nmemb(json->vbuf_internal);
+    cx_array_init_fixed(json->vbuf, json->vbuf_internal, 0);
 }
 
 void cxJsonDestroy(CxJson *json) {