diff --git a/conf/arm64.src b/conf/arm64.src
index 855cd5e..76aefb5 100644
--- a/conf/arm64.src
+++ b/conf/arm64.src
@@ -3,5 +3,4 @@ SOURCE_SUM=05ce23e5a653eef8c9e4e3a187a21c5e21fb45606a924fdef744a60102baabe7
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=gz
 SOURCE_IN_SUBDIR=false
-SOURCE_FILENAME=
 SOURCE_EXTRACT=false