diff --git a/src/ecmascript/mujs/element.c b/src/ecmascript/mujs/element.c
index d33ab80cd..764b85ff5 100644
--- a/src/ecmascript/mujs/element.c
+++ b/src/ecmascript/mujs/element.c
@@ -1302,7 +1302,7 @@ dump_element(struct string *buf, dom_node *node, bool toSortAttrs)
 	//save_in_map(mapa, node, buf->length);
 
 	/* Get string data and print element name */
-	add_bytes_to_string(buf, dom_string_data(node_name), dom_string_byte_length(node_name));
+	add_lowercase_to_string(buf, dom_string_data(node_name), dom_string_byte_length(node_name));
 
 	exc = dom_node_get_attributes(node, &attrs);
 
@@ -1386,7 +1386,7 @@ walk_tree(struct string *buf, void *nod, bool start, bool toSortAttrs)
 
 			if (exc == DOM_NO_ERR && node_name) {
 				add_to_string(buf, "</");
-				add_bytes_to_string(buf, dom_string_data(node_name), dom_string_length(node_name));
+				add_lowercase_to_string(buf, dom_string_data(node_name), dom_string_length(node_name));
 				add_char_to_string(buf, '>');
 				dom_string_unref(node_name);
 			}
diff --git a/src/ecmascript/quickjs/element.c b/src/ecmascript/quickjs/element.c
index 3324a9d87..2c696f4a7 100644
--- a/src/ecmascript/quickjs/element.c
+++ b/src/ecmascript/quickjs/element.c
@@ -18,6 +18,7 @@
 #include "dialogs/status.h"
 #include "document/document.h"
 #include "document/libdom/corestrings.h"
+#include "document/libdom/doc.h"
 #include "document/libdom/mapa.h"
 #include "document/libdom/renderer2.h"
 #include "document/view.h"
@@ -1351,7 +1352,7 @@ dump_element(struct string *buf, dom_node *node, bool toSortAttrs)
 	//save_in_map(mapa, node, buf->length);
 
 	/* Get string data and print element name */
-	add_bytes_to_string(buf, dom_string_data(node_name), dom_string_byte_length(node_name));
+	add_lowercase_to_string(buf, dom_string_data(node_name), dom_string_byte_length(node_name));
 
 	exc = dom_node_get_attributes(node, &attrs);
 
@@ -1435,7 +1436,7 @@ walk_tree(struct string *buf, void *nod, bool start, bool toSortAttrs)
 
 			if (exc == DOM_NO_ERR && node_name) {
 				add_to_string(buf, "</");
-				add_bytes_to_string(buf, dom_string_data(node_name), dom_string_length(node_name));
+				add_lowercase_to_string(buf, dom_string_data(node_name), dom_string_length(node_name));
 				add_char_to_string(buf, '>');
 				dom_string_unref(node_name);
 			}
diff --git a/src/ecmascript/spidermonkey/element.cpp b/src/ecmascript/spidermonkey/element.cpp
index dfcfcb945..008b4166e 100644
--- a/src/ecmascript/spidermonkey/element.cpp
+++ b/src/ecmascript/spidermonkey/element.cpp
@@ -2512,7 +2512,7 @@ dump_element(struct string *buf, dom_node *node, bool toSortAttrs)
 	//save_in_map(mapa, node, buf->length);
 
 	/* Get string data and print element name */
-	add_bytes_to_string(buf, dom_string_data(node_name), dom_string_byte_length(node_name));
+	add_lowercase_to_string(buf, dom_string_data(node_name), dom_string_byte_length(node_name));
 
 	exc = dom_node_get_attributes(node, &attrs);
 
@@ -2596,7 +2596,7 @@ walk_tree(struct string *buf, void *nod, bool start, bool toSortAttrs)
 
 			if (exc == DOM_NO_ERR && node_name) {
 				add_to_string(buf, "</");
-				add_bytes_to_string(buf, dom_string_data(node_name), dom_string_length(node_name));
+				add_lowercase_to_string(buf, dom_string_data(node_name), dom_string_length(node_name));
 				add_char_to_string(buf, '>');
 				dom_string_unref(node_name);
 			}