diff --git a/src/libslic3r/Config.cpp b/src/libslic3r/Config.cpp
index 69630c16a..a290532a2 100644
--- a/src/libslic3r/Config.cpp
+++ b/src/libslic3r/Config.cpp
@@ -308,6 +308,7 @@ ConfigOption* ConfigOptionDef::create_default_option() const
                 opt->keys_map = this->enum_keys_map;
                 return opt;
             }
+            delete dft;
         }
 
         return this->default_value->clone();
diff --git a/src/slic3r/GUI/ProjectDirtyStateManager.cpp b/src/slic3r/GUI/ProjectDirtyStateManager.cpp
index 5d32ca348..c6a23723d 100644
--- a/src/slic3r/GUI/ProjectDirtyStateManager.cpp
+++ b/src/slic3r/GUI/ProjectDirtyStateManager.cpp
@@ -35,6 +35,7 @@ void ProjectDirtyStateManager::update_from_presets()
                 if (ConfigOption *color_option = wxGetApp().preset_bundle->project_config.option("filament_colour")) {
                     auto colors = static_cast<ConfigOptionStrings *>(color_option->clone());
                     m_presets_dirty |= m_initial_filament_presets_colors != colors->values;
+                    delete colors;
                 }
             } else {
                 m_presets_dirty |= !m_initial_presets[type].empty() && m_initial_presets[type] != name;
@@ -66,6 +67,7 @@ void ProjectDirtyStateManager::reset_initial_presets()
             if (ConfigOption *color_option = wxGetApp().preset_bundle->project_config.option("filament_colour")) {
                 auto colors = static_cast<ConfigOptionStrings *>(color_option->clone());
                 m_initial_filament_presets_colors = colors->values;
+                delete colors;
             }
         } else {
             m_initial_presets[type] = name;