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-rw-r--r--c/src/tests/tools/generic/difftest2
1 files changed, 1 insertions, 1 deletions
diff --git a/c/src/tests/tools/generic/difftest b/c/src/tests/tools/generic/difftest
index 7c21155dbb..1f76cdf356 100644
--- a/c/src/tests/tools/generic/difftest
+++ b/c/src/tests/tools/generic/difftest
@@ -55,7 +55,7 @@ do
fatal;;
esac
done
-((shiftcount = $OPTIND - 1))
+shiftcount=`expr $OPTIND - 1`
shift $shiftcount
args=$*