diff --git a/base/src/model.rs b/base/src/model.rs
index a334ebb..4bd36ec 100644
--- a/base/src/model.rs
+++ b/base/src/model.rs
@@ -865,7 +865,11 @@ impl Model {
 
         let worksheet_names = worksheets.iter().map(|s| s.get_name()).collect();
 
-        let defined_names = workbook.get_defined_names_with_scope();
+        let defined_names = workbook
+            .get_defined_names_with_scope()
+            .iter()
+            .map(|s| (s.0.to_owned(), s.1))
+            .collect();
         // add all tables
         // let mut tables = Vec::new();
         // for worksheet in worksheets {
diff --git a/base/src/new_empty.rs b/base/src/new_empty.rs
index 92f0e2e..454821b 100644
--- a/base/src/new_empty.rs
+++ b/base/src/new_empty.rs
@@ -144,7 +144,12 @@ impl Model {
 
     /// Reparses all formulas and defined names
     pub(crate) fn reset_parsed_structures(&mut self) {
-        let defined_names = self.workbook.get_defined_names_with_scope();
+        let defined_names = self
+            .workbook
+            .get_defined_names_with_scope()
+            .iter()
+            .map(|s| (s.0.to_owned(), s.1))
+            .collect();
         self.parser
             .set_worksheets_and_names(self.workbook.get_worksheet_names(), defined_names);
         self.parsed_formulas = vec![];
diff --git a/base/src/test/user_model/test_defined_names.rs b/base/src/test/user_model/test_defined_names.rs
index 88700e7..23c50dd 100644
--- a/base/src/test/user_model/test_defined_names.rs
+++ b/base/src/test/user_model/test_defined_names.rs
@@ -15,6 +15,11 @@ fn create_defined_name() {
         Ok("42".to_string())
     );
 
+    assert_eq!(
+        model.get_defined_name_list(),
+        vec![("myName".to_string(), None, "Sheet1!$A$1".to_string())]
+    );
+
     // delete it
     model.delete_defined_name("myName", None).unwrap();
     assert_eq!(
@@ -22,6 +27,8 @@ fn create_defined_name() {
         Ok("#NAME?".to_string())
     );
 
+    assert_eq!(model.get_defined_name_list().len(), 0);
+
     model.undo().unwrap();
     assert_eq!(
         model.get_formatted_cell_value(0, 5, 7),
@@ -324,3 +331,68 @@ fn invalid_formula() {
         Ok("#NAME?".to_string())
     );
 }
+
+#[test]
+fn undo_redo() {
+    let mut model = UserModel::new_empty("model", "en", "UTC").unwrap();
+    model.set_user_input(0, 1, 1, "Hello").unwrap();
+    model.set_user_input(0, 2, 1, "Hola").unwrap();
+    model.set_user_input(0, 1, 2, r#"=MyName&"!""#).unwrap();
+
+    model
+        .new_defined_name("MyName", None, "Sheet1!$A$1")
+        .unwrap();
+
+    assert_eq!(
+        model.get_formatted_cell_value(0, 1, 2),
+        Ok("Hello!".to_string())
+    );
+    model.undo().unwrap();
+    assert_eq!(model.get_defined_name_list().len(), 0);
+    assert_eq!(
+        model.get_formatted_cell_value(0, 1, 2),
+        Ok("#NAME?".to_string())
+    );
+    model.redo().unwrap();
+
+    assert_eq!(model.get_defined_name_list().len(), 1);
+    assert_eq!(
+        model.get_formatted_cell_value(0, 1, 2),
+        Ok("Hello!".to_string())
+    );
+
+    model
+        .update_defined_name("MyName", None, "MyName", None, "Sheet1!$A$2")
+        .unwrap();
+    assert_eq!(model.get_defined_name_list().len(), 1);
+    assert_eq!(
+        model.get_formatted_cell_value(0, 1, 2),
+        Ok("Hola!".to_string())
+    );
+    model.undo().unwrap();
+
+    assert_eq!(model.get_defined_name_list().len(), 1);
+    assert_eq!(
+        model.get_formatted_cell_value(0, 1, 2),
+        Ok("Hello!".to_string())
+    );
+
+    model.redo().unwrap();
+
+    assert_eq!(model.get_defined_name_list().len(), 1);
+    assert_eq!(
+        model.get_formatted_cell_value(0, 1, 2),
+        Ok("Hola!".to_string())
+    );
+
+    let send_queue = model.flush_send_queue();
+
+    let mut model2 = UserModel::new_empty("model", "en", "UTC").unwrap();
+    model2.apply_external_diffs(&send_queue).unwrap();
+
+    assert_eq!(model2.get_defined_name_list().len(), 1);
+    assert_eq!(
+        model2.get_formatted_cell_value(0, 1, 2),
+        Ok("Hola!".to_string())
+    );
+}
diff --git a/base/src/user_model/common.rs b/base/src/user_model/common.rs
index 601eeab..7c5fc76 100644
--- a/base/src/user_model/common.rs
+++ b/base/src/user_model/common.rs
@@ -13,8 +13,8 @@ use crate::{
     },
     model::Model,
     types::{
-        Alignment, BorderItem, CellType, Col, DefinedName, HorizontalAlignment, SheetProperties,
-        SheetState, Style, VerticalAlignment,
+        Alignment, BorderItem, CellType, Col, HorizontalAlignment, SheetProperties, SheetState,
+        Style, VerticalAlignment,
     },
     utils::is_valid_hex_color,
 };
@@ -1735,8 +1735,8 @@ impl UserModel {
     }
 
     /// Returns the list of defined names
-    pub fn get_defined_name_list(&self) -> Vec<DefinedName> {
-        self.model.workbook.defined_names.clone()
+    pub fn get_defined_name_list(&self) -> Vec<(String, Option<u32>, String)> {
+        self.model.workbook.get_defined_names_with_scope()
     }
 
     /// Delete an existing defined name
diff --git a/base/src/workbook.rs b/base/src/workbook.rs
index 606ee81..05e05e9 100644
--- a/base/src/workbook.rs
+++ b/base/src/workbook.rs
@@ -29,7 +29,7 @@ impl Workbook {
     }
 
     /// Returns the a list of defined names in the workbook with their scope
-    pub(crate) fn get_defined_names_with_scope(&self) -> Vec<(String, Option<u32>)> {
+    pub(crate) fn get_defined_names_with_scope(&self) -> Vec<(String, Option<u32>, String)> {
         let sheet_id_index: Vec<u32> = self.worksheets.iter().map(|s| s.sheet_id).collect();
 
         let defined_names = self
@@ -45,7 +45,7 @@ impl Workbook {
                     // convert Option<usize> to Option<u32>
                     .map(|pos| pos as u32);
 
-                (dn.name.clone(), index)
+                (dn.name.clone(), index, dn.formula.clone())
             })
             .collect::<Vec<_>>();
         defined_names
diff --git a/bindings/wasm/src/lib.rs b/bindings/wasm/src/lib.rs
index ec23c2d..c440520 100644
--- a/bindings/wasm/src/lib.rs
+++ b/bindings/wasm/src/lib.rs
@@ -568,12 +568,11 @@ impl Model {
             .get_defined_name_list()
             .iter()
             .map(|s| DefinedName {
-                name: s.name.to_string(),
-                scope: s.sheet_id,
-                formula: s.formula.to_string(),
+                name: s.0.to_owned(),
+                scope: s.1,
+                formula: s.2.to_owned(),
             })
             .collect();
-        // Ok(data)
         serde_wasm_bindgen::to_value(&data).map_err(|e| to_js_error(e.to_string()))
     }