diff --git a/src/libslic3r/Config.hpp b/src/libslic3r/Config.hpp
index 1b9db373f..090ad13be 100644
--- a/src/libslic3r/Config.hpp
+++ b/src/libslic3r/Config.hpp
@@ -871,8 +871,8 @@ public:
     ConfigOptionType        type()  const override { return static_type(); }
     ConfigOption*           clone() const override { return new ConfigOptionPercentsTempl(*this); }
     ConfigOptionPercentsTempl& operator=(const ConfigOption *opt) { this->set(opt); return *this; }
-    bool                    operator==(const ConfigOptionPercentsTempl &rhs) const throw() { return this->values == rhs.values; }
-    bool                    operator< (const ConfigOptionPercentsTempl &rhs) const throw() { return vectors_lower(this->values, rhs.values); }
+    bool                    operator==(const ConfigOptionPercentsTempl &rhs) const throw() { return ConfigOptionFloatsTempl<NULLABLE>::vectors_equal(this->values, rhs.values); }
+    bool                    operator< (const ConfigOptionPercentsTempl &rhs) const throw() { return ConfigOptionFloatsTempl<NULLABLE>::vectors_lower(this->values, rhs.values); }
 
     std::string serialize() const override
     {