diff --git a/build_wasm.sh b/build_wasm.sh
new file mode 100644
index 00000000..b60a93a1
--- /dev/null
+++ b/build_wasm.sh
@@ -0,0 +1,3 @@
+rm -rf build/wasm/
+mkdir -p build/wasm/
+emcc src/main.cpp -fexceptions -o build/wasm/index.html
diff --git a/src/iter.h b/src/iter.h
index 819809bc..20150f1f 100644
--- a/src/iter.h
+++ b/src/iter.h
@@ -20,7 +20,7 @@ public:
         }
     }
 
-    PyVar next();
+    PyVar next() override;
 };
 
 class VectorIterator : public _Iterator {