emscripten: SDL_PrivateJoystickAdded() wants an instance id, not device index.
diff --git a/src/joystick/emscripten/SDL_sysjoystick.c b/src/joystick/emscripten/SDL_sysjoystick.c
index d551c8a..1ccfe8f 100644
--- a/src/joystick/emscripten/SDL_sysjoystick.c
+++ b/src/joystick/emscripten/SDL_sysjoystick.c
@@ -97,7 +97,7 @@
 
     ++numjoysticks;
 
-    SDL_PrivateJoystickAdded(numjoysticks - 1);
+    SDL_PrivateJoystickAdded(item->device_instance);
 
 #ifdef DEBUG_JOYSTICK
     SDL_Log("Number of joysticks is %d", numjoysticks);