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-rwxr-xr-xtools/run-centos2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/run-centos b/tools/run-centos
index b10e3bc4..d44d5145 100755
--- a/tools/run-centos
+++ b/tools/run-centos
@@ -262,7 +262,7 @@ main() {
return 0
}
-if [ "$1" = "prep" ]; then
+if [ "${1:-}" = "prep" ]; then
shift
prep "$@"
else