diff --git a/exprtk.hpp b/exprtk.hpp
index 2c6c2ae..e3012c9 100644
--- a/exprtk.hpp
+++ b/exprtk.hpp
@@ -3924,7 +3924,7 @@ namespace exprtk
       template <typename T> struct sfext07_op : public sf_base<T> { typedef typename sf_base<T>::Type Type; static inline T process(Type x, Type y, Type z, Type w) { return (x - y) - (z / w); } static inline std::string id() { return "(t-t)-(t/t)";} };
       template <typename T> struct sfext08_op : public sf_base<T> { typedef typename sf_base<T>::Type Type; static inline T process(Type x, Type y, Type z, Type w) { return (x + y) - (z - w); } static inline std::string id() { return "(t+t)-(t-t)";} };
       template <typename T> struct sfext09_op : public sf_base<T> { typedef typename sf_base<T>::Type Type; static inline T process(Type x, Type y, Type z, Type w) { return (x + y) + (z - w); } static inline std::string id() { return "(t+t)+(t-t)";} };
-      template <typename T> struct sfext10_op : public sf_base<T> { typedef typename sf_base<T>::Type Type; static inline T process(Type x, Type y, Type z, Type w) { return (x + y) * (z - w); } static inline std::string id() { return "(t+t)-(t-t)";} };
+      template <typename T> struct sfext10_op : public sf_base<T> { typedef typename sf_base<T>::Type Type; static inline T process(Type x, Type y, Type z, Type w) { return (x + y) * (z - w); } static inline std::string id() { return "(t+t)*(t-t)";} };
       template <typename T> struct sfext11_op : public sf_base<T> { typedef typename sf_base<T>::Type Type; static inline T process(Type x, Type y, Type z, Type w) { return (x + y) / (z - w); } static inline std::string id() { return "(t+t)/(t-t)";} };
       template <typename T> struct sfext12_op : public sf_base<T> { typedef typename sf_base<T>::Type Type; static inline T process(Type x, Type y, Type z, Type w) { return (x - y) - (z + w); } static inline std::string id() { return "(t-t)-(t+t)";} };
       template <typename T> struct sfext13_op : public sf_base<T> { typedef typename sf_base<T>::Type Type; static inline T process(Type x, Type y, Type z, Type w) { return (x - y) + (z + w); } static inline std::string id() { return "(t-t)+(t+t)";} };