diff --git a/runtime/src/launcher/js/launcher.js b/runtime/src/launcher/js/launcher.js
index 406b7349c41..0f2a7069b68 100644
--- a/runtime/src/launcher/js/launcher.js
+++ b/runtime/src/launcher/js/launcher.js
@@ -129,6 +129,11 @@ let konan_dependencies = {
             fromString(utf8encode(readline() + '\n'), str);
             return str;
         },
+        read: function (file, str, size) {
+            let string = utf8encode(readline() + '\n');
+            fromString(string.substring(0, size), str);
+            return string.length;
+        },
         Konan_notify_memory_grow: function() {
             heap = new Uint8Array(instance.exports.memory.buffer);
         },