diff --git a/tinyxml2.h b/tinyxml2.h
index cfb1053..d508727 100755
--- a/tinyxml2.h
+++ b/tinyxml2.h
@@ -305,9 +305,9 @@ private:
         if ( cap > _allocated ) {
             TIXMLASSERT( cap <= INT_MAX / 2 );
             const int newAllocated = cap * 2;
-            T* newMem = new T[newAllocated];
+            T* newMem = new T[static_cast<size_t>(newAllocated)];
             TIXMLASSERT( newAllocated >= _size );
-            memcpy( newMem, _mem, sizeof(T)*_size );	// warning: not using constructors, only works for PODs
+            memcpy( newMem, _mem, sizeof(T)*static_cast<size_t>(_size) );	// warning: not using constructors, only works for PODs
             if ( _mem != _pool ) {
                 delete [] _mem;
             }
@@ -603,7 +603,7 @@ public:
         TIXMLASSERT( p );
         TIXMLASSERT( q );
         TIXMLASSERT( nChar >= 0 );
-        return strncmp( p, q, nChar ) == 0;
+        return strncmp( p, q, static_cast<size_t>(nChar) ) == 0;
     }
 
     inline static bool IsUTF8Continuation( const char p ) {