diff --git a/apps/openmw/mwrender/creatureanimation.cpp b/apps/openmw/mwrender/creatureanimation.cpp
index d4e48e1fd2..669d0d8a16 100644
--- a/apps/openmw/mwrender/creatureanimation.cpp
+++ b/apps/openmw/mwrender/creatureanimation.cpp
@@ -7,6 +7,7 @@
 #include <components/sceneutil/attach.hpp>
 #include <components/sceneutil/visitor.hpp>
 #include <components/sceneutil/positionattitudetransform.hpp>
+#include <components/sceneutil/skeleton.hpp>
 
 #include "../mwbase/world.hpp"
 
@@ -109,6 +110,8 @@ void CreatureWeaponAnimation::updatePart(PartHolderPtr& scene, int slot)
     osg::ref_ptr<osg::Node> node = mResourceSystem->getSceneManager()->getInstance(item.getClass().getModel(item));
     osg::ref_ptr<osg::Node> attached = SceneUtil::attach(node, mObjectRoot, bonename, bonename);
     mResourceSystem->getSceneManager()->notifyAttached(attached);
+    if (mSkeleton)
+        mSkeleton->markDirty();
 
     scene.reset(new PartHolder(attached));
 
diff --git a/apps/openmw/mwrender/npcanimation.cpp b/apps/openmw/mwrender/npcanimation.cpp
index e44e2fb302..b1f506e116 100644
--- a/apps/openmw/mwrender/npcanimation.cpp
+++ b/apps/openmw/mwrender/npcanimation.cpp
@@ -15,6 +15,7 @@
 #include <components/resource/scenemanager.hpp>
 #include <components/sceneutil/attach.hpp>
 #include <components/sceneutil/visitor.hpp>
+#include <components/sceneutil/skeleton.hpp>
 
 #include <components/nifosg/nifloader.hpp> // TextKeyMapHolder
 
@@ -666,6 +667,8 @@ PartHolderPtr NpcAnimation::insertBoundedPart(const std::string& model, const st
 {
     osg::ref_ptr<osg::Node> instance = mResourceSystem->getSceneManager()->getInstance(model);
     osg::ref_ptr<osg::Node> attached = SceneUtil::attach(instance, mObjectRoot, bonefilter, bonename);
+    if (mSkeleton)
+        mSkeleton->markDirty();
     mResourceSystem->getSceneManager()->notifyAttached(attached);
     if (enchantedGlow)
         addGlow(attached, *glowColor);
diff --git a/components/sceneutil/skeleton.cpp b/components/sceneutil/skeleton.cpp
index 08ac72e91e..390a8e8235 100644
--- a/components/sceneutil/skeleton.cpp
+++ b/components/sceneutil/skeleton.cpp
@@ -144,6 +144,12 @@ bool Skeleton::getActive() const
     return mActive;
 }
 
+void Skeleton::markDirty()
+{
+    mTraversedEvenFrame = false;
+    mTraversedOddFrame = false;
+}
+
 void Skeleton::traverse(osg::NodeVisitor& nv)
 {
     if (!getActive() && nv.getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR
diff --git a/components/sceneutil/skeleton.hpp b/components/sceneutil/skeleton.hpp
index 835ab6617a..764b7f6459 100644
--- a/components/sceneutil/skeleton.hpp
+++ b/components/sceneutil/skeleton.hpp
@@ -53,6 +53,9 @@ namespace SceneUtil
 
         bool getActive() const;
 
+        /// If a new RigGeometry is added after the Skeleton has already been rendered, you must call markDirty().
+        void markDirty();
+
         void traverse(osg::NodeVisitor& nv);
 
     private: