diff --git a/targets/targets.json b/targets/targets.json
index 727f3f6781..f6f724be1f 100644
--- a/targets/targets.json
+++ b/targets/targets.json
@@ -7171,7 +7171,6 @@
             "PORTINOUT",
             "PORTOUT",
             "PWMOUT",
-            "RESET_REASON",
             "SERIAL",
             "SERIAL_ASYNCH",
             "SERIAL_FC",