diff --git a/src/libslic3r/Config.cpp b/src/libslic3r/Config.cpp
index 017563256a..75935b2177 100644
--- a/src/libslic3r/Config.cpp
+++ b/src/libslic3r/Config.cpp
@@ -455,8 +455,12 @@ void ConfigBase::apply_only(const ConfigBase &other, const t_config_option_keys
                 auto opt_key2 = opt_key.substr(0, n);
                 auto my_opt2 = dynamic_cast<ConfigOptionVectorBase*>(this->option(opt_key2));
                 auto other_opt = other.option(opt_key2);
-                if (my_opt2 == nullptr && other_opt)
+                if (my_opt2 == nullptr && other_opt) {
                     my_opt2 = dynamic_cast<ConfigOptionVectorBase *>(this->option(opt_key2, true));
+                    if (my_opt2->empty()) {
+                        my_opt2->resize(1, other_opt);
+                    }
+                }   
                 if (my_opt2) {
                     int index = std::atoi(opt_key.c_str() + n + 1);
                     if (other_opt)