diff --git a/lib/binding_web/exports.json b/lib/binding_web/exports.json
index 71151b71..ad7a6987 100644
--- a/lib/binding_web/exports.json
+++ b/lib/binding_web/exports.json
@@ -17,6 +17,7 @@
   "__Znwm",
   "___cxa_atexit",
   "_abort",
+  "_isalpha",
   "_iswalnum",
   "_iswalpha",
   "_iswdigit",