diff --git a/components/resource/scenemanager.cpp b/components/resource/scenemanager.cpp
index 4f0658e033..41f65ba0ab 100644
--- a/components/resource/scenemanager.cpp
+++ b/components/resource/scenemanager.cpp
@@ -273,7 +273,7 @@ namespace Resource
                correct format for OpenMW: <Description>alphatest mode value MaterialName</Description>
                                       e.g <Description>alphatest GEQUAL 0.8 MyAlphaTestedMaterial</Description> */
             std::vector<std::string> descriptions = node.getDescriptions();
-            for (auto description : descriptions)
+            for (const auto & description : descriptions)
             {
                 mDescriptions.emplace_back(description);
             }
@@ -281,7 +281,7 @@ namespace Resource
             // Iterate each description, and see if the current node uses the specified material for alpha testing
             if (node.getStateSet())
             {
-                for (auto description : mDescriptions)
+                for (const auto & description : mDescriptions)
                 {
                     std::vector<std::string> descriptionParts;
                     std::istringstream descriptionStringStream(description);
diff --git a/components/sceneutil/mwshadowtechnique.cpp b/components/sceneutil/mwshadowtechnique.cpp
index daf6bb80ab..d56708e46c 100644
--- a/components/sceneutil/mwshadowtechnique.cpp
+++ b/components/sceneutil/mwshadowtechnique.cpp
@@ -1404,7 +1404,7 @@ void MWShadowTechnique::cull(osgUtil::CullVisitor& cv)
                     std::string validRegionUniformName = "validRegionMatrix" + std::to_string(sm_i);
                     osg::ref_ptr<osg::Uniform> validRegionUniform;
 
-                    for (auto uniform : _uniforms[cv.getTraversalNumber() % 2])
+                    for (const auto & uniform : _uniforms[cv.getTraversalNumber() % 2])
                     {
                         if (uniform->getName() == validRegionUniformName)
                             validRegionUniform = uniform;
diff --git a/components/sceneutil/osgacontroller.cpp b/components/sceneutil/osgacontroller.cpp
index 520b2d177b..4d0f7a460a 100644
--- a/components/sceneutil/osgacontroller.cpp
+++ b/components/sceneutil/osgacontroller.cpp
@@ -33,7 +33,7 @@ namespace SceneUtil
             if (channelTargetName != umt->getName()) continue;
 
             // check if we can link a StackedTransformElement to the current Channel
-            for (auto stackedTransform : umt->getStackedTransforms())
+            for (const auto & stackedTransform : umt->getStackedTransforms())
             {
                 osgAnimation::StackedTransformElement* element = stackedTransform.get();
                 if (element && !element->getName().empty() && channelName == element->getName())