diff --git a/ext/libxml/libxml.c b/ext/libxml/libxml.c
index adb48bd7a5e..0ac351d9979 100644
--- a/ext/libxml/libxml.c
+++ b/ext/libxml/libxml.c
@@ -952,6 +952,10 @@ int php_libxml_decrement_doc_ref(php_libxml_node_object *object TSRMLS_DC) {
 				xmlFreeDoc((xmlDoc *) object->document->ptr);
 			}
 			if (object->document->doc_props != NULL) {
+				if (object->document->doc_props->classmap) {
+					zend_hash_destroy(object->document->doc_props->classmap);
+					FREE_HASHTABLE(object->document->doc_props->classmap);
+				}
 				efree(object->document->doc_props);
 			}
 			efree(object->document);
diff --git a/ext/libxml/php_libxml.h b/ext/libxml/php_libxml.h
index 584465fd37c..ffefff362e1 100644
--- a/ext/libxml/php_libxml.h
+++ b/ext/libxml/php_libxml.h
@@ -43,10 +43,21 @@ typedef struct {
 	zend_llist *error_list;
 } php_libxml_globals;
 
+typedef struct _libxml_doc_props {
+	int formatoutput;
+	int validateonparse;
+	int resolveexternals;
+	int preservewhitespace;
+	int substituteentities;
+	int stricterror;
+	int recover;
+	HashTable *classmap;
+} libxml_doc_props;
+
 typedef struct _php_libxml_ref_obj {
 	void *ptr;
 	int   refcount;
-	void *doc_props;
+	libxml_doc_props *doc_props;
 } php_libxml_ref_obj;
 
 typedef struct _php_libxml_node_ptr {