diff --git a/include/assimp/anim.h b/include/assimp/anim.h
index dcd054d1e..8a73297a5 100644
--- a/include/assimp/anim.h
+++ b/include/assimp/anim.h
@@ -98,6 +98,7 @@ struct aiVectorKey {
     bool operator<(const aiVectorKey &rhs) const {
         return mTime < rhs.mTime;
     }
+    
     bool operator>(const aiVectorKey &rhs) const {
         return mTime > rhs.mTime;
     }
@@ -131,6 +132,7 @@ struct aiQuatKey {
     bool operator==(const aiQuatKey &rhs) const {
         return rhs.mValue == this->mValue;
     }
+    
     bool operator!=(const aiQuatKey &rhs) const {
         return rhs.mValue != this->mValue;
     }
@@ -139,6 +141,7 @@ struct aiQuatKey {
     bool operator<(const aiQuatKey &rhs) const {
         return mTime < rhs.mTime;
     }
+    
     bool operator>(const aiQuatKey &rhs) const {
         return mTime > rhs.mTime;
     }
diff --git a/include/assimp/mesh.h b/include/assimp/mesh.h
index 8223b3443..225f8556a 100644
--- a/include/assimp/mesh.h
+++ b/include/assimp/mesh.h
@@ -300,6 +300,10 @@ struct aiBone {
     aiBone() AI_NO_EXCEPT
             : mName(),
               mNumWeights(0),
+#ifndef ASSIMP_BUILD_NO_ARMATUREPOPULATE_PROCESS
+              mArmature(nullptr),
+              mNode(nullptr),
+#endif
               mWeights(nullptr),
               mOffsetMatrix() {
         // empty
@@ -309,6 +313,10 @@ struct aiBone {
     aiBone(const aiBone &other) :
             mName(other.mName),
             mNumWeights(other.mNumWeights),
+#ifndef ASSIMP_BUILD_NO_ARMATUREPOPULATE_PROCESS
+              mArmature(nullptr),
+              mNode(nullptr),
+#endif
             mWeights(nullptr),
             mOffsetMatrix(other.mOffsetMatrix) {
         if (other.mWeights && other.mNumWeights) {