diff --git a/csharp/tools/autobuild.sh b/csharp/tools/autobuild.sh
index e8e007a10d74..39d10b38f3b5 100755
--- a/csharp/tools/autobuild.sh
+++ b/csharp/tools/autobuild.sh
@@ -2,7 +2,7 @@
 
 set -eu
 
-if [ "$CODEQL_PLATFORM" != "linux64" ] && [ "$CODEQL_PLATFORM" != "osx64" ] ; then
+if [ "$CODEQL_PLATFORM" != "linux64" ] && [ "$CODEQL_PLATFORM" != "linux-arm64" ] && [ "$CODEQL_PLATFORM" != "osx64" ] ; then
     echo "Automatic build detection for $CODEQL_PLATFORM is not implemented."
     exit 1
 fi