diff --git a/ports/webassembly/objpyproxy.js b/ports/webassembly/objpyproxy.js
index 3b94f8aadc782..0eafd0dec53de 100644
--- a/ports/webassembly/objpyproxy.js
+++ b/ports/webassembly/objpyproxy.js
@@ -148,6 +148,12 @@ const py_proxy_handler = {
};
},
has(target, prop) {
+ // avoid throwing on `Symbol() in proxy` checks
+ if (typeof prop !== "string") {
+ // returns true only on iterator because other
+ // symbols are not considered in the `get` trap
+ return prop === Symbol.iterator;
+ }
return Module.ccall(
"proxy_c_to_js_has_attr",
"number",
diff --git a/tests/ports/webassembly/py_proxy_has.mjs b/tests/ports/webassembly/py_proxy_has.mjs
index 8881776fdbe51..37df0ae1794c9 100644
--- a/tests/ports/webassembly/py_proxy_has.mjs
+++ b/tests/ports/webassembly/py_proxy_has.mjs
@@ -9,3 +9,5 @@ x = []
const x = mp.globals.get("x");
console.log("no_exist" in x);
console.log("sort" in x);
+console.log(Symbol.toStringTag in x);
+console.log(Symbol.iterator in x);
diff --git a/tests/ports/webassembly/py_proxy_has.mjs.exp b/tests/ports/webassembly/py_proxy_has.mjs.exp
index 1d474d5255713..7565230c01f70 100644
--- a/tests/ports/webassembly/py_proxy_has.mjs.exp
+++ b/tests/ports/webassembly/py_proxy_has.mjs.exp
@@ -1,2 +1,4 @@
false
true
+false
+true
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