diff --git a/util/flash_ec b/util/flash_ec
index d19aa0508d..80cf0ddf8b 100755
--- a/util/flash_ec
+++ b/util/flash_ec
@@ -70,6 +70,7 @@ BOARDS_STM32=(
 	oak_pd
 	pit
 	plankton
+	rainier
 	samus_pd
 	scarlet
 	staff