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-rw-r--r--src/libutil/args.hh2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libutil/args.hh b/src/libutil/args.hh
index fd910b965ccc..044ed209e3bf 100644
--- a/src/libutil/args.hh
+++ b/src/libutil/args.hh
@@ -26,6 +26,8 @@ public:
 
 protected:
 
+    static const size_t ArityAny = std::numeric_limits<size_t>::max();
+
     /* Flags. */
     struct Flag
     {