diff --git a/addons/web/static/src/core/domain_selector/domain_selector_leaf_node.js b/addons/web/static/src/core/domain_selector/domain_selector_leaf_node.js
index 847e53a1c97..65fe7c9fd71 100644
--- a/addons/web/static/src/core/domain_selector/domain_selector_leaf_node.js
+++ b/addons/web/static/src/core/domain_selector/domain_selector_leaf_node.js
@@ -86,9 +86,8 @@ export class DomainSelectorLeafNode extends Component {
         const changes = { operator: operatorInfo.value };
         Object.assign(
             changes,
-            operatorInfo.onDidChange(
-                this.getOperatorInfo(this.props.node.operator),
-                component.onDidTypeChange
+            operatorInfo.onDidChange(this.getOperatorInfo(this.props.node.operator), () =>
+                component.onDidTypeChange(this.fieldInfo)
             )
         );
         this.props.node.update(changes);
diff --git a/addons/web/static/tests/core/domain_selector_tests.js b/addons/web/static/tests/core/domain_selector_tests.js
index 46cfcef9742..180f73b9ac6 100644
--- a/addons/web/static/tests/core/domain_selector_tests.js
+++ b/addons/web/static/tests/core/domain_selector_tests.js
@@ -9,7 +9,7 @@ import { registry } from "@web/core/registry";
 import { uiService } from "@web/core/ui/ui_service";
 import { viewService } from "@web/views/view_service";
 import { makeTestEnv } from "../helpers/mock_env";
-import { click, getFixture, mount, triggerEvent } from "../helpers/utils";
+import { click, editSelect, getFixture, mount, triggerEvent } from "../helpers/utils";
 import { makeFakeLocalizationService } from "../helpers/mock_services";
 
 const { Component, xml } = owl;
@@ -500,4 +500,47 @@ QUnit.module("Components", (hooks) => {
 
         assert.verifySteps(["fields_get"]);
     });
+
+    QUnit.test("selection field with operator change from 'is set' to '='", async (assert) => {
+        serverData.models.partner.fields.state = {
+            string: "State",
+            type: "selection",
+            selection: [
+                ["abc", "ABC"],
+                ["def", "DEF"],
+                ["ghi", "GHI"],
+            ],
+        };
+
+        class Parent extends Component {
+            setup() {
+                this.value = `[['state', '!=', false]]`;
+            }
+            onUpdate(newValue) {
+                this.value = newValue;
+                this.render();
+            }
+        }
+        Parent.components = { DomainSelector };
+        Parent.template = xml`
+            <DomainSelector
+                resModel="'partner'"
+                value="value"
+                readonly="false"
+                update="(newValue) => this.onUpdate(newValue)"
+            />
+        `;
+
+        // Create the domain selector and its mock environment
+        await mountComponent(Parent);
+
+        assert.strictEqual(target.querySelector(".o_field_selector_chain_part").innerText, "State");
+        assert.strictEqual(target.querySelector(".o_domain_leaf_operator_select").value, "2"); // option "!="
+
+        await editSelect(target, ".o_domain_leaf_operator_select", 0);
+
+        assert.strictEqual(target.querySelector(".o_field_selector_chain_part").innerText, "State");
+        assert.strictEqual(target.querySelector(".o_domain_leaf_operator_select").value, "0"); // option "="
+        assert.strictEqual(target.querySelector(".o_domain_leaf_value_input").value, "abc");
+    });
 });