diff --git a/ArduCopter/ReleaseNotes.txt b/ArduCopter/ReleaseNotes.txt
index 8b10ecbc7b..eae6c68e39 100644
--- a/ArduCopter/ReleaseNotes.txt
+++ b/ArduCopter/ReleaseNotes.txt
@@ -1,5 +1,15 @@
 ArduPilot Copter Release Notes:
 ------------------------------------------------------------------
+Copter 3.6.6-rc1 02-Feb-2019
+Changes from 3.6.5
+1) AP_RSSI fixes and minor enhancements
+    a) RSSI pwm input driver for ChibiOS
+    b) add V5 Nano to RSSI_ANA_PIN parameter description
+2) Bug fixes and minor enhancements
+    a) TradHeli roll trim ramp time fix
+    b) First Spline waypoint no longer skipped
+    c) RC override (from GCS Joystick) disable fix (command to disable overrides could be interpreted as real input)
+------------------------------------------------------------------
 Copter 3.6.5 24-Jan-2019 / 3.6.5-rc3 21-Jan-2019
 Changes from 3.6.5-rc2
 1) Bug fixes: