diff --git a/tinyxml2.cpp b/tinyxml2.cpp
index 4ce2184..8259e69 100755
--- a/tinyxml2.cpp
+++ b/tinyxml2.cpp
@@ -534,16 +534,19 @@
 #endif
     XMLNode* returnNode = 0;
     if ( XMLUtil::StringEqual( p, xmlHeader, xmlHeaderLen ) ) {
+        TIXMLASSERT( sizeof( XMLDeclaration ) == _commentPool.ItemSize() );
         returnNode = new (_commentPool.Alloc()) XMLDeclaration( this );
         returnNode->_memPool = &_commentPool;
         p += xmlHeaderLen;
     }
     else if ( XMLUtil::StringEqual( p, commentHeader, commentHeaderLen ) ) {
+        TIXMLASSERT( sizeof( XMLComment ) == _commentPool.ItemSize() );
         returnNode = new (_commentPool.Alloc()) XMLComment( this );
         returnNode->_memPool = &_commentPool;
         p += commentHeaderLen;
     }
     else if ( XMLUtil::StringEqual( p, cdataHeader, cdataHeaderLen ) ) {
+        TIXMLASSERT( sizeof( XMLText ) == _textPool.ItemSize() );
         XMLText* text = new (_textPool.Alloc()) XMLText( this );
         returnNode = text;
         returnNode->_memPool = &_textPool;
@@ -551,16 +554,19 @@
         text->SetCData( true );
     }
     else if ( XMLUtil::StringEqual( p, dtdHeader, dtdHeaderLen ) ) {
+        TIXMLASSERT( sizeof( XMLUnknown ) == _commentPool.ItemSize() );
         returnNode = new (_commentPool.Alloc()) XMLUnknown( this );
         returnNode->_memPool = &_commentPool;
         p += dtdHeaderLen;
     }
     else if ( XMLUtil::StringEqual( p, elementHeader, elementHeaderLen ) ) {
+        TIXMLASSERT( sizeof( XMLElement ) == _elementPool.ItemSize() );
         returnNode = new (_elementPool.Alloc()) XMLElement( this );
         returnNode->_memPool = &_elementPool;
         p += elementHeaderLen;
     }
     else {
+        TIXMLASSERT( sizeof( XMLText ) == _textPool.ItemSize() );
         returnNode = new (_textPool.Alloc()) XMLText( this );
         returnNode->_memPool = &_textPool;
         p = start;	// Back it up, all the text counts.
@@ -1423,6 +1429,7 @@
         }
     }
     if ( !attrib ) {
+        TIXMLASSERT( sizeof( XMLAttribute ) == _document->_attributePool.ItemSize() );
         attrib = new (_document->_attributePool.Alloc() ) XMLAttribute();
         attrib->_memPool = &_document->_attributePool;
         if ( last ) {
@@ -1472,6 +1479,7 @@
 
         // attribute.
         if (XMLUtil::IsNameStartChar( *p ) ) {
+            TIXMLASSERT( sizeof( XMLAttribute ) == _document->_attributePool.ItemSize() );
             XMLAttribute* attrib = new (_document->_attributePool.Alloc() ) XMLAttribute();
             attrib->_memPool = &_document->_attributePool;
 			attrib->_memPool->SetTracked();
@@ -1693,6 +1701,7 @@
 
 XMLElement* XMLDocument::NewElement( const char* name )
 {
+    TIXMLASSERT( sizeof( XMLElement ) == _elementPool.ItemSize() );
     XMLElement* ele = new (_elementPool.Alloc()) XMLElement( this );
     ele->_memPool = &_elementPool;
     ele->SetName( name );
@@ -1702,6 +1711,7 @@
 
 XMLComment* XMLDocument::NewComment( const char* str )
 {
+    TIXMLASSERT( sizeof( XMLComment ) == _commentPool.ItemSize() );
     XMLComment* comment = new (_commentPool.Alloc()) XMLComment( this );
     comment->_memPool = &_commentPool;
     comment->SetValue( str );
@@ -1711,6 +1721,7 @@
 
 XMLText* XMLDocument::NewText( const char* str )
 {
+    TIXMLASSERT( sizeof( XMLText ) == _textPool.ItemSize() );
     XMLText* text = new (_textPool.Alloc()) XMLText( this );
     text->_memPool = &_textPool;
     text->SetValue( str );
@@ -1720,6 +1731,7 @@
 
 XMLDeclaration* XMLDocument::NewDeclaration( const char* str )
 {
+    TIXMLASSERT( sizeof( XMLDeclaration ) == _commentPool.ItemSize() );
     XMLDeclaration* dec = new (_commentPool.Alloc()) XMLDeclaration( this );
     dec->_memPool = &_commentPool;
     dec->SetValue( str ? str : "xml version=\"1.0\" encoding=\"UTF-8\"" );
@@ -1729,6 +1741,7 @@
 
 XMLUnknown* XMLDocument::NewUnknown( const char* str )
 {
+    TIXMLASSERT( sizeof( XMLUnknown ) == _commentPool.ItemSize() );
     XMLUnknown* unk = new (_commentPool.Alloc()) XMLUnknown( this );
     unk->_memPool = &_commentPool;
     unk->SetValue( str );