diff --git a/code/BVHLoader.h b/code/BVHLoader.h
index 0836488ff..a18ad81d9 100644
--- a/code/BVHLoader.h
+++ b/code/BVHLoader.h
@@ -84,7 +84,10 @@ class BVHLoader : public BaseImporter
         std::vector<ChannelType> mChannels;
         std::vector<float> mChannelValues; // motion data values for that node. Of size NumChannels * NumFrames
 
-        Node() { }
+        Node()
+        : mNode(nullptr)
+        { }
+
         explicit Node( const aiNode* pNode) : mNode( pNode) { }
     };
 
diff --git a/code/BaseImporter.cpp b/code/BaseImporter.cpp
index f653d8d81..0892efd9f 100644
--- a/code/BaseImporter.cpp
+++ b/code/BaseImporter.cpp
@@ -157,9 +157,6 @@ void BaseImporter::GetExtensionList(std::set<std::string>& extensions)
         // read 200 characters from the file
         std::unique_ptr<char[]> _buffer (new char[searchBytes+1 /* for the '\0' */]);
         char* buffer = _buffer.get();
-        if( NULL == buffer ) {
-            return false;
-        }
 
         const size_t read = pStream->Read(buffer,1,searchBytes);
         if( !read ) {
diff --git a/code/CSMLoader.cpp b/code/CSMLoader.cpp
index 7b0064164..7160740c1 100644
--- a/code/CSMLoader.cpp
+++ b/code/CSMLoader.cpp
@@ -136,7 +136,7 @@ void CSMImporter::InternReadFile( const std::string& pFile,
     TextFileToBuffer(file.get(),mBuffer2);
     const char* buffer = &mBuffer2[0];
 
-    aiAnimation* anim = new aiAnimation();
+    std::unique_ptr<aiAnimation> anim(new aiAnimation());
     int first = 0, last = 0x00ffffff;
 
     // now process the file and look out for '$' sections
@@ -294,8 +294,8 @@ void CSMImporter::InternReadFile( const std::string& pFile,
 
     // Store the one and only animation in the scene
     pScene->mAnimations    = new aiAnimation*[pScene->mNumAnimations=1];
-    pScene->mAnimations[0] = anim;
     anim->mName.Set("$CSM_MasterAnim");
+    pScene->mAnimations[0] = anim.release();
 
     // mark the scene as incomplete and run SkeletonMeshBuilder on it
     pScene->mFlags |= AI_SCENE_FLAGS_INCOMPLETE;
diff --git a/code/LimitBoneWeightsProcess.h b/code/LimitBoneWeightsProcess.h
index 2fc6e02b1..090181982 100644
--- a/code/LimitBoneWeightsProcess.h
+++ b/code/LimitBoneWeightsProcess.h
@@ -120,7 +120,11 @@ public:
     {
         unsigned int mBone; ///< Index of the bone
         float mWeight;      ///< Weight of that bone on this vertex
-        Weight() { }
+        Weight()
+        : mBone(0)
+        , mWeight(0.0f)
+        { }
+
         Weight( unsigned int pBone, float pWeight)
         {
             mBone = pBone;
diff --git a/code/PretransformVertices.cpp b/code/PretransformVertices.cpp
index 6c569c185..cc5c669e4 100644
--- a/code/PretransformVertices.cpp
+++ b/code/PretransformVertices.cpp
@@ -651,7 +651,8 @@ void PretransformVertices::Execute( aiScene* pScene)
             // generate mesh nodes
             for (unsigned int i = 0; i < pScene->mNumMeshes;++i,++nodes)
             {
-                aiNode* pcNode = *nodes = new aiNode();
+                aiNode* pcNode = new aiNode();
+                *nodes = pcNode;
                 pcNode->mParent = pScene->mRootNode;
                 pcNode->mName = pScene->mMeshes[i]->mName;
 
@@ -663,7 +664,8 @@ void PretransformVertices::Execute( aiScene* pScene)
             // generate light nodes
             for (unsigned int i = 0; i < pScene->mNumLights;++i,++nodes)
             {
-                aiNode* pcNode = *nodes = new aiNode();
+                aiNode* pcNode = new aiNode();
+                *nodes = pcNode;
                 pcNode->mParent = pScene->mRootNode;
                 pcNode->mName.length = ai_snprintf(pcNode->mName.data, MAXLEN, "light_%u",i);
                 pScene->mLights[i]->mName = pcNode->mName;
@@ -671,7 +673,8 @@ void PretransformVertices::Execute( aiScene* pScene)
             // generate camera nodes
             for (unsigned int i = 0; i < pScene->mNumCameras;++i,++nodes)
             {
-                aiNode* pcNode = *nodes = new aiNode();
+                aiNode* pcNode = new aiNode();
+                *nodes = pcNode;
                 pcNode->mParent = pScene->mRootNode;
                 pcNode->mName.length = ::ai_snprintf(pcNode->mName.data,MAXLEN,"cam_%u",i);
                 pScene->mCameras[i]->mName = pcNode->mName;
diff --git a/include/assimp/Importer.hpp b/include/assimp/Importer.hpp
index 1263868bc..9ae8fccc6 100644
--- a/include/assimp/Importer.hpp
+++ b/include/assimp/Importer.hpp
@@ -139,6 +139,11 @@ public:
      */
     Importer(const Importer& other);
 
+    // -------------------------------------------------------------------
+    /** Assignment operator has been deleted
+     */
+    Importer &operator=(const Importer &) = delete;
+
     // -------------------------------------------------------------------
     /** Destructor. The object kept ownership of the imported data,
      * which now will be destroyed along with the object.
diff --git a/include/assimp/anim.h b/include/assimp/anim.h
index 9156aac06..1a2c11044 100644
--- a/include/assimp/anim.h
+++ b/include/assimp/anim.h
@@ -162,7 +162,10 @@ struct aiMeshKey
 
 #ifdef __cplusplus
 
-    aiMeshKey() {
+    aiMeshKey()
+    : mTime(0.0)
+    , mValue(0)
+    {
     }
 
     /** Construction from a given time and key value */
diff --git a/include/assimp/matrix3x3.inl b/include/assimp/matrix3x3.inl
index aaf62eb0f..ab2cc410b 100644
--- a/include/assimp/matrix3x3.inl
+++ b/include/assimp/matrix3x3.inl
@@ -313,16 +313,16 @@ inline aiMatrix3x3t<TReal>& aiMatrix3x3t<TReal>::FromToMatrix(const aiVector3t<T
         u.x = x.x - from.x; u.y = x.y - from.y; u.z = x.z - from.z;
         v.x = x.x - to.x;   v.y = x.y - to.y;   v.z = x.z - to.z;
 
-        const TReal c1 = static_cast<TReal>(2.0) / (u * u);
-        const TReal c2 = static_cast<TReal>(2.0) / (v * v);
-        const TReal c3 = c1 * c2  * (u * v);
+        const TReal c1_ = static_cast<TReal>(2.0) / (u * u);
+        const TReal c2_ = static_cast<TReal>(2.0) / (v * v);
+        const TReal c3_ = c1_ * c2_  * (u * v);
 
         for (unsigned int i = 0; i < 3; i++)
         {
             for (unsigned int j = 0; j < 3; j++)
             {
-                mtx[i][j] =  - c1 * u[i] * u[j] - c2 * v[i] * v[j]
-                    + c3 * v[i] * u[j];
+                mtx[i][j] =  - c1_ * u[i] * u[j] - c2_ * v[i] * v[j]
+                    + c3_ * v[i] * u[j];
             }
             mtx[i][i] += static_cast<TReal>(1.0);
         }
diff --git a/include/assimp/mesh.h b/include/assimp/mesh.h
index a532e2b46..5896284f6 100644
--- a/include/assimp/mesh.h
+++ b/include/assimp/mesh.h
@@ -212,7 +212,10 @@ struct aiVertexWeight
 #ifdef __cplusplus
 
     //! Default constructor
-    aiVertexWeight() { }
+    aiVertexWeight()
+    : mVertexId(0)
+    , mWeight(0.0f)
+    { }
 
     //! Initialisation from a given index and vertex weight factor
     //! \param pID ID
@@ -270,6 +273,32 @@ struct aiBone
         }
     }
 
+
+    //! Assignment operator
+    aiBone &operator=(const aiBone& other)
+    {
+        if (this == &other) {
+            return *this;
+        }
+
+        mName         = other.mName;
+        mNumWeights   = other.mNumWeights;
+        mOffsetMatrix = other.mOffsetMatrix;
+
+        if (other.mWeights && other.mNumWeights)
+        {
+            if (mWeights) {
+                delete[] mWeights;
+            }
+
+            mWeights = new aiVertexWeight[mNumWeights];
+            ::memcpy(mWeights,other.mWeights,mNumWeights * sizeof(aiVertexWeight));
+        }
+
+        return *this;
+    }
+
+
     //! Destructor - deletes the array of vertex weights
     ~aiBone()
     {
diff --git a/include/assimp/types.h b/include/assimp/types.h
index f0d9b2428..9868f657c 100644
--- a/include/assimp/types.h
+++ b/include/assimp/types.h
@@ -304,6 +304,20 @@ struct aiString
         data[len] = 0;
     }
 
+
+    /** Assigment operator */
+    aiString& operator = (const aiString &rOther) {
+        if (this == &rOther) {
+            return *this;
+        }
+
+        length = rOther.length;;
+        memcpy( data, rOther.data, length);
+        data[length] = '\0';
+        return *this;
+    }
+
+
     /** Assign a const char* to the string */
     aiString& operator = (const char* sz) {
         Set(sz);