--- a/ui/cocoa/button.m	Sat Feb 21 20:02:31 2026 +0100
+++ b/ui/cocoa/button.m	Fri Mar 13 17:22:32 2026 +0100
@@ -370,7 +370,7 @@
     
     CxJsonWriter writer = cxJsonWriterCompact();
     CxBuffer buf;
-    cxBufferInit(&buf, NULL, 128, NULL, CX_BUFFER_AUTO_EXTEND);
+    cxBufferInit(&buf, NULL, NULL, 128, bCX_BUFFER_AUTO_EXTEND);
     cxJsonWrite(&buf, obj, (cx_write_func)cxBufferWrite, &writer);
     cxJsonValueFree(obj);
     cxBufferTerminate(&buf);