diff --git a/src/libslic3r/Config.hpp b/src/libslic3r/Config.hpp
index fb77e85e5..2b87968f5 100644
--- a/src/libslic3r/Config.hpp
+++ b/src/libslic3r/Config.hpp
@@ -550,6 +550,8 @@ public:
             if (inherits->size() != rhs->size())
                 throw ConfigurationError("ConfigOptionVector::set_with_nil(): rhs size different with inherits size");
 
+            this->values.resize(inherits->size(), this->values.front());
+
             for (size_t i = 0; i < inherits_opt->size(); i= i+stride) {
                 bool set_nil = true;
                 for (size_t j = 0; j < stride; j++) {
diff --git a/src/libslic3r/Preset.cpp b/src/libslic3r/Preset.cpp
index ca3cc2c8f..965159ca3 100644
--- a/src/libslic3r/Preset.cpp
+++ b/src/libslic3r/Preset.cpp
@@ -544,7 +544,9 @@ bool Preset::save(DynamicPrintConfig* parent_config)
                 ConfigOptionVectorBase* opt_vec_src = static_cast<ConfigOptionVectorBase*>(opt_src);
                 ConfigOptionVectorBase* opt_vec_dst = static_cast<ConfigOptionVectorBase*>(opt_dst);
                 ConfigOptionVectorBase* opt_vec_inherit = static_cast<ConfigOptionVectorBase*>(parent_config->option(option));
-                if (key_set1->find(option) != key_set1->end()) {
+                if (opt_vec_src->size() == 1)
+                    opt_dst->set(opt_src);
+                else if (key_set1->find(option) != key_set1->end()) {
                     opt_vec_dst->set_with_nil(opt_vec_src, opt_vec_inherit, 1);
                 }
                 else if (key_set2->find(option) != key_set2->end()) {