diff --git a/Source/7zip/7zip/Compress/LZ/BinTree/BinTree.h b/Source/7zip/7zip/Compress/LZ/BinTree/BinTree.h
index 67acb025..f9c079f4 100644
--- a/Source/7zip/7zip/Compress/LZ/BinTree/BinTree.h
+++ b/Source/7zip/7zip/Compress/LZ/BinTree/BinTree.h
@@ -96,7 +96,7 @@ class CInTree: public CLZInWindow
 
 public:
   CInTree();
-  ~CInTree();
+  virtual ~CInTree();
   HRESULT Create(UINT32 sizeHistory, UINT32 keepAddBufferBefore, UINT32 matchMaxLen, 
       UINT32 keepAddBufferAfter, UINT32 sizeReserv = (1<<17));
 	HRESULT Init(ISequentialInStream *stream);
diff --git a/Source/7zip/7zip/Compress/LZ/BinTree/BinTreeMF.h b/Source/7zip/7zip/Compress/LZ/BinTree/BinTreeMF.h
index 9903db4f..5b3f1328 100644
--- a/Source/7zip/7zip/Compress/LZ/BinTree/BinTreeMF.h
+++ b/Source/7zip/7zip/Compress/LZ/BinTree/BinTreeMF.h
@@ -62,6 +62,7 @@ class CInTree2: public CInTree
   virtual void BeforeMoveBlock();
   virtual void AfterMoveBlock();
 public:
+  virtual ~CInTree2() {}
   void SetCallback(IMatchFinderCallback *callback)
   {
     _callback = callback;
@@ -102,6 +103,7 @@ public:
   void SetWindowReservSize(UINT32 reservWindowSize)
     { m_WindowReservSize = reservWindowSize; }
   */
+  virtual ~CMatchFinderBinTree() {}
 };
  
 }
diff --git a/Source/7zip/7zip/Compress/LZ/LZInWindow.h b/Source/7zip/7zip/Compress/LZ/LZInWindow.h
index 6ae2da16..089f0f7a 100644
--- a/Source/7zip/7zip/Compress/LZ/LZInWindow.h
+++ b/Source/7zip/7zip/Compress/LZ/LZInWindow.h
@@ -30,7 +30,7 @@ protected:
   void Free();
 public:
   CLZInWindow(): _bufferBase(0) {}
-  ~CLZInWindow();
+  virtual ~CLZInWindow();
   void Create(UINT32 keepSizeBefore, UINT32 keepSizeAfter, 
       UINT32 keepSizeReserv = (1<<17));
 
diff --git a/Source/7zip/7zip/Compress/LZMA/LZMAEncoder.h b/Source/7zip/7zip/Compress/LZMA/LZMAEncoder.h
index 9580d740..3ef78546 100644
--- a/Source/7zip/7zip/Compress/LZMA/LZMAEncoder.h
+++ b/Source/7zip/7zip/Compress/LZMA/LZMAEncoder.h
@@ -249,6 +249,7 @@ private:
 
 public:
   CEncoder();
+  virtual ~CEncoder() {}
   void SetWriteEndMarkerMode(bool writeEndMarker)
     { _writeEndMark= writeEndMarker; }
 
diff --git a/Source/exehead/util.c b/Source/exehead/util.c
index 77402098..2006921b 100644
--- a/Source/exehead/util.c
+++ b/Source/exehead/util.c
@@ -132,7 +132,7 @@ void NSISCALL myDelete(char *buf, int flags)
           if (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
           {
 #ifdef NSIS_SUPPORT_RMDIR
-            if ((flags & DEL_DIR | DEL_RECURSE) == (DEL_DIR | DEL_RECURSE))
+            if ((flags & (DEL_DIR | DEL_RECURSE)) == (DEL_DIR | DEL_RECURSE))
             {
               myDelete(buf,flags);
             }
diff --git a/Source/zlib/INFBLOCK.C b/Source/zlib/INFBLOCK.C
index 7a6a598e..7ffd009a 100644
--- a/Source/zlib/INFBLOCK.C
+++ b/Source/zlib/INFBLOCK.C
@@ -447,11 +447,11 @@ int ZEXPORT inflate(z_streamp z)
       while (s->sub.trees.index < 4 + (s->sub.trees.table >> 10))
       {
         NEEDBITS(3)
-        s->sub.trees.t_blens[border[s->sub.trees.index++]] = (uInt)b & 7;
+        s->sub.trees.t_blens[(int)border[s->sub.trees.index++]] = (uInt)b & 7;
         DUMPBITS(3)
       }
       while (s->sub.trees.index < 19)
-        s->sub.trees.t_blens[border[s->sub.trees.index++]] = 0;
+        s->sub.trees.t_blens[(int)border[s->sub.trees.index++]] = 0;
       s->sub.trees.bb = 7;
 
       {