diff --git a/src/xml/attributes.cr b/src/xml/attributes.cr
index 10fd2b558e22..5b25fd33c29a 100644
--- a/src/xml/attributes.cr
+++ b/src/xml/attributes.cr
@@ -1,6 +1,6 @@
 require "./node"
 
-struct XML::Attributes
+class XML::Attributes
   include Enumerable(Node)
 
   def initialize(@node : Node)
diff --git a/src/xml/builder.cr b/src/xml/builder.cr
index 4597314ed99d..fecc9e50d119 100644
--- a/src/xml/builder.cr
+++ b/src/xml/builder.cr
@@ -4,7 +4,7 @@
 # an invalid XML (for example, if invoking `end_element`
 # without a matching `start_element`, or trying to use
 # a non-string value as an object's field name)
-struct XML::Builder
+class XML::Builder
   private CDATA_END    = "]]>"
   private CDATA_ESCAPE = "]]]]><![CDATA[>"
 
diff --git a/src/xml/namespace.cr b/src/xml/namespace.cr
index 5bcd22995fa8..95b0115170fb 100644
--- a/src/xml/namespace.cr
+++ b/src/xml/namespace.cr
@@ -1,4 +1,4 @@
-struct XML::Namespace
+class XML::Namespace
   getter document : Node
 
   def initialize(@document : Node, @ns : LibXML::NS*)
diff --git a/src/xml/node.cr b/src/xml/node.cr
index bed80378d35a..4ec9540b711e 100644
--- a/src/xml/node.cr
+++ b/src/xml/node.cr
@@ -1,4 +1,4 @@
-struct XML::Node
+class XML::Node
   LOOKS_LIKE_XPATH = /^(\.\/|\/|\.\.|\.$)/
 
   # Creates a new node.
diff --git a/src/xml/node/type.cr b/src/xml/node/type.cr
index 32d0d0c69da6..1945b756477d 100644
--- a/src/xml/node/type.cr
+++ b/src/xml/node/type.cr
@@ -1,4 +1,4 @@
-struct XML::Node
+class XML::Node
   enum Type
     NONE               =  0
     ELEMENT_NODE       =  1
diff --git a/src/xml/node_set.cr b/src/xml/node_set.cr
index 33b7afbf2d8a..7d26f5520b82 100644
--- a/src/xml/node_set.cr
+++ b/src/xml/node_set.cr
@@ -1,4 +1,4 @@
-struct XML::NodeSet
+class XML::NodeSet
   include Enumerable(Node)
 
   def initialize(@doc : Node, @set : LibXML::NodeSet*)
diff --git a/src/xml/reader.cr b/src/xml/reader.cr
index b5f8e8af42cd..f48873bdedce 100644
--- a/src/xml/reader.cr
+++ b/src/xml/reader.cr
@@ -1,7 +1,7 @@
 require "./libxml2"
 require "./parser_options"
 
-struct XML::Reader
+class XML::Reader
   # Creates a new reader from a string.
   #
   # See `XML::ParserOptions.default` for default options.
diff --git a/src/xml/reader/type.cr b/src/xml/reader/type.cr
index 50c156a08143..6c618745773d 100644
--- a/src/xml/reader/type.cr
+++ b/src/xml/reader/type.cr
@@ -1,4 +1,4 @@
-struct XML::Reader
+class XML::Reader
   enum Type
     NONE                   =  0
     ELEMENT                =  1
diff --git a/src/xml/xpath_context.cr b/src/xml/xpath_context.cr
index f6509237e023..e416f67c931d 100644
--- a/src/xml/xpath_context.cr
+++ b/src/xml/xpath_context.cr
@@ -1,4 +1,4 @@
-struct XML::XPathContext
+class XML::XPathContext
   def initialize(node : Node)
     @ctx = LibXML.xmlXPathNewContext(node.to_unsafe.value.doc)
     @ctx.value.node = node.to_unsafe