diff --git a/apps/openmw/mwgui/class.cpp b/apps/openmw/mwgui/class.cpp
index ee5fe59399..1732bc24ea 100644
--- a/apps/openmw/mwgui/class.cpp
+++ b/apps/openmw/mwgui/class.cpp
@@ -517,6 +517,7 @@ namespace MWGui
     std::vector<ESM::Skill::SkillEnum> CreateClassDialog::getMajorSkills() const
     {
         std::vector<ESM::Skill::SkillEnum> v;
+        v.reserve(5);
         for(int i = 0; i < 5; i++)
         {
             v.push_back(mMajorSkill[i]->getSkillId());
@@ -527,6 +528,7 @@ namespace MWGui
     std::vector<ESM::Skill::SkillEnum> CreateClassDialog::getMinorSkills() const
     {
         std::vector<ESM::Skill::SkillEnum> v;
+        v.reserve(5);
         for(int i=0; i < 5; i++)
         {
             v.push_back(mMinorSkill[i]->getSkillId());
diff --git a/apps/openmw/mwrender/screenshotmanager.cpp b/apps/openmw/mwrender/screenshotmanager.cpp
index b9ea5daacf..5a047a1566 100644
--- a/apps/openmw/mwrender/screenshotmanager.cpp
+++ b/apps/openmw/mwrender/screenshotmanager.cpp
@@ -191,6 +191,7 @@ namespace MWRender
             screenshotH = screenshotW;   // use square resolution for planet mapping
 
         std::vector<osg::ref_ptr<osg::Image>> images;
+        images.reserve(6);
 
         for (int i = 0; i < 6; ++i)
             images.push_back(new osg::Image);