diff --git a/Makefile b/Makefile
index 7651b66..04ec18c 100644
--- a/Makefile
+++ b/Makefile
@@ -33,7 +33,7 @@ JS_ASMJS_TARGET := javascript/olm_legacy.js
WASM_TARGET := $(BUILD_DIR)/wasm/libolm.a
JS_EXPORTED_FUNCTIONS := javascript/exported_functions.json
-JS_EXTRA_EXPORTED_RUNTIME_METHODS := ALLOC_STACK
+JS_EXTRA_EXPORTED_RUNTIME_METHODS := [ALLOC_STACK]
JS_EXTERNS := javascript/externs.js
PUBLIC_HEADERS := include/olm/olm.h include/olm/outbound_group_session.h include/olm/inbound_group_session.h include/olm/pk.h include/olm/sas.h
diff --git a/javascript/README.md b/javascript/README.md
index d2f1d72..bdf0224 100644
--- a/javascript/README.md
+++ b/javascript/README.md
@@ -2,7 +2,8 @@ Olm
===
Note: before using any of the olm functions, you must call `Olm.init()`, and
-wait for the promise to resolve.
+wait for the promise to resolve, otherwise you will get errors like:
+`Uncaught TypeError: Olm.Account is not a constructor`
Example:
diff --git a/javascript/demo/group_demo.js b/javascript/demo/group_demo.js
index 42a3d84..7cd9e3e 100644
--- a/javascript/demo/group_demo.js
+++ b/javascript/demo/group_demo.js
@@ -489,4 +489,8 @@ function startDemo() {
}
-document.addEventListener("DOMContentLoaded", startDemo, false);
+document.addEventListener("DOMContentLoaded", function() {
+ Olm.init().then(function() {
+ startDemo();
+ });
+}, false);
diff --git a/javascript/demo/one_to_one_demo.html b/javascript/demo/one_to_one_demo.html
index fc7e654..a225e4a 100644
--- a/javascript/demo/one_to_one_demo.html
+++ b/javascript/demo/one_to_one_demo.html
@@ -2,7 +2,13 @@