diff --git a/util/abuild/abuild b/util/abuild/abuild
index 233a661..0e7e97b 100755
--- a/util/abuild/abuild
+++ b/util/abuild/abuild
@@ -181,7 +181,7 @@
 	local targets
 	local VARIANT_UC
 
-	VARIANT_UC=$(echo "${variant}" | tr '[:lower:]' '[:upper:]')
+	VARIANT_UC=$(echo "${variant}" | tr '[:lower:]' '[:upper:]' | tr '-' '_')
 
 	targets=$(get_mainboards "$1")
 	if [ -n "$targets" ]; then