diff --git a/include/jsoncons_ext/jmespath/jmespath.hpp b/include/jsoncons_ext/jmespath/jmespath.hpp
index 419fbda9b..61f042928 100644
--- a/include/jsoncons_ext/jmespath/jmespath.hpp
+++ b/include/jsoncons_ext/jmespath/jmespath.hpp
@@ -790,7 +790,7 @@ namespace jmespath {
                     sum += j.template as<double>();
                 }
 
-                return arg0.size() == 0 ? resources.null_value() : *resources.create_json(sum / arg0.size());
+                return sum == 0 ? resources.null_value() : *resources.create_json(sum/arg0.size());
             }
         };