diff --git a/build_library/toolchain_util.sh b/build_library/toolchain_util.sh
index cb9d8245b8..0132d63e69 100644
--- a/build_library/toolchain_util.sh
+++ b/build_library/toolchain_util.sh
@@ -22,7 +22,7 @@ CROSS_PROFILES["x86_64-cros-linux-gnu"]="coreos:coreos/amd64/generic"
 declare -A BOARD_CHOSTS BOARD_PROFILES
 BOARD_CHOSTS["amd64-generic"]="x86_64-cros-linux-gnu"
 BOARD_PROFILES["amd64-generic"]="coreos:coreos/amd64/generic"
-BOARD_NAMES=( "${!BOARD_CHOST[@]}" )
+BOARD_NAMES=( "${!BOARD_CHOSTS[@]}" )
 
 # Declare the above globals as read-only to avoid accidental conflicts.
 declare -r \