diff --git a/targets/targets.json b/targets/targets.json
index b02ed1aceb..8ec140ef6f 100644
--- a/targets/targets.json
+++ b/targets/targets.json
@@ -6880,7 +6880,6 @@
             "PORTINOUT",
             "PORTOUT",
             "PWMOUT",
-            "RESET_REASON",
             "SERIAL",
             "SERIAL_ASYNCH",
             "SERIAL_FC",