diff --git a/ext/libxml/ruby_xml_attributes.h b/ext/libxml/ruby_xml_attributes.h
index f657453b..2f5dfed3 100644
--- a/ext/libxml/ruby_xml_attributes.h
+++ b/ext/libxml/ruby_xml_attributes.h
@@ -1,15 +1,17 @@
-/* Please see the LICENSE file for copyright and distribution information */
-
-#ifndef __RXML_ATTRIBUTES__
-#define __RXML_ATTRIBUTES__
-
-extern VALUE cXMLAttributesibutes;
-
-void rxml_init_attributes(void);
-VALUE rxml_attributes_new(xmlNodePtr xnode);
-
-VALUE rxml_attributes_attribute_get(VALUE self, VALUE name);
-VALUE rxml_attributes_attribute_set(VALUE self, VALUE name, VALUE value);
-
-
-#endif
+/* Please see the LICENSE file for copyright and distribution information */
+
+#ifndef __RXML_ATTRIBUTES__
+#define __RXML_ATTRIBUTES__
+
+#include <libxml/tree.h>
+
+extern VALUE cXMLAttributesibutes;
+
+void rxml_init_attributes(void);
+VALUE rxml_attributes_new(xmlNodePtr xnode);
+
+VALUE rxml_attributes_attribute_get(VALUE self, VALUE name);
+VALUE rxml_attributes_attribute_set(VALUE self, VALUE name, VALUE value);
+
+
+#endif
diff --git a/ext/libxml/ruby_xml_encoding.h b/ext/libxml/ruby_xml_encoding.h
index 62c53209..7490c9a1 100644
--- a/ext/libxml/ruby_xml_encoding.h
+++ b/ext/libxml/ruby_xml_encoding.h
@@ -4,6 +4,8 @@
 #define __RXML_ENCODING__
 
 #include <ruby/encoding.h>
+#include <libxml/encoding.h>
+#include <libxml/xmlstring.h>
 
 extern VALUE mXMLEncoding;