2 files changed, 5 insertions, 3 deletions
diff --git a/platform/javascript/os_javascript.cpp b/platform/javascript/os_javascript.cpp
index 0bdd090ba9..665280df96 100644
--- a/platform/javascript/os_javascript.cpp
+++ b/platform/javascript/os_javascript.cpp
@@ -419,7 +419,7 @@ void send_notification(int notif) {
 }
 }
 
-void OS_JavaScript::initialize(const VideoMode &p_desired, int p_video_driver, int p_audio_driver) {
+Error OS_JavaScript::initialize(const VideoMode &p_desired, int p_video_driver, int p_audio_driver) {
 
 	print_line("Init OS");
 
@@ -429,7 +429,7 @@ void OS_JavaScript::initialize(const VideoMode &p_desired, int p_video_driver, i
 	attributes.antialias = false;
 	attributes.majorVersion = 2;
 	EMSCRIPTEN_WEBGL_CONTEXT_HANDLE ctx = emscripten_webgl_create_context(NULL, &attributes);
-	ERR_FAIL_COND(emscripten_webgl_make_context_current(ctx) != EMSCRIPTEN_RESULT_SUCCESS);
+	ERR_FAIL_COND(emscripten_webgl_make_context_current(ctx) != EMSCRIPTEN_RESULT_SUCCESS, ERR_UNAVAILABLE);
 
 	video_mode = p_desired;
 	// can't fulfil fullscreen request due to browser security
@@ -507,6 +507,8 @@ void OS_JavaScript::initialize(const VideoMode &p_desired, int p_video_driver, i
 #undef EM_CHECK
 
 	visual_server->init();
+
+	return OK;
 }
 
 void OS_JavaScript::set_main_loop(MainLoop *p_main_loop) {
diff --git a/platform/javascript/os_javascript.h b/platform/javascript/os_javascript.h
index 8acaac9ef3..eaf8465be9 100644
--- a/platform/javascript/os_javascript.h
+++ b/platform/javascript/os_javascript.h
@@ -82,7 +82,7 @@ public:
 	virtual const char *get_audio_driver_name(int p_driver) const;
 
 	virtual void initialize_core();
-	virtual void initialize(const VideoMode &p_desired, int p_video_driver, int p_audio_driver);
+	virtual Error initialize(const VideoMode &p_desired, int p_video_driver, int p_audio_driver);
 
 	virtual void set_main_loop(MainLoop *p_main_loop);
 	virtual void delete_main_loop();