diff --git a/Compatibility-issues.md b/Compatibility-issues.md
index 8ac1906..7ca3872 100644
--- a/Compatibility-issues.md
+++ b/Compatibility-issues.md
@@ -4,7 +4,8 @@
 - [CodeBender](#codebender)
 - [Arduino Zero, mkr1000 and all boards based on SAMD21](#arduino-zero-mkr1000-and-all-boards-based-on-samd21)
 - [Warning: ignoring packed attribute because of unpacked non-POD field](#warning-ignoring-packed-attribute-because-of-unpacked-non-pod-field)
-- [Error: undefined reference to `__cxa_guard_acquire` and `__cxa_guard_release`](#error-undefined-reference-to-__cxa_guard_acquire-and-__cxa_guard_release)
+- [Error: undefined reference to `__cxa_guard_acquire` and `__cxa_guard_release`](#error-undefined-reference-to-cxaguardacquire-and-cxaguardrelease)
+- [Adafruit WICED](#adafruit-wiced)
 
 <!-- /MarkdownTOC -->
 
@@ -66,3 +67,14 @@ You need to add the following flag:
 > Do not emit the extra code to use the routines specified in the C++ ABI for thread-safe initialization of local statics. You can use this option to reduce code size slightly in code that doesn't need to be thread-safe. 
 
 See issue [#356](https://github.com/bblanchon/ArduinoJson/issues/356) and [#389](https://github.com/bblanchon/ArduinoJson/issues/389)
+
+
+## Adafruit WICED
+
+There is currently a bug in the Arduino Core for Adafruit WICED Feather causing the following error:
+
+```
+error: cannot convert 'err_t' to 'err_t (*)()
+```
+
+See issue [#404](https://github.com/bblanchon/ArduinoJson/issues/404)