diff --git a/contrib/ocs b/contrib/ocs

index e924f4f..bd556b4 100755

--- a/contrib/ocs

+++ b/contrib/ocs

@@ -210,7 +210,7 @@ exp_inc()

     then

 	for i in `cat ${theInc}`

 	do

-	    printf "-I $i "

+	    printf -- "-I $i "

 	done

     fi

 }

-- 

2.26.2