diff --git a/packages/code-du-travail-frontend/src/search/Search.js b/packages/code-du-travail-frontend/src/search/Search.js
index 2f61fa93d2..ccb2b84ca0 100755
--- a/packages/code-du-travail-frontend/src/search/Search.js
+++ b/packages/code-du-travail-frontend/src/search/Search.js
@@ -42,7 +42,7 @@ class Search extends React.Component {
       });
     }
     if (this.props.router.query.source) {
-      const source = this.props.router.query.source;
+      const source = this.props.router.query.source || "";
       const excludeSources = getExcludeSources(source);
       this.setState({ source, excludeSources });
     }
@@ -62,7 +62,7 @@ class Search extends React.Component {
     }
     this.setState({
       query: this.props.router.query.q,
-      source: this.props.router.query.source,
+      source: this.props.router.query.source || "",
       coord: coord,
       excludeSources: getExcludeSources(this.props.router.query.source || "")
     });
@@ -100,6 +100,9 @@ class Search extends React.Component {
         });
         return;
       case "source":
+        if (this.state.source === event.target.value) {
+          return;
+        }
         this.setState({
           source: event.target.value,
           excludeSources: getExcludeSources(event.target.value)
diff --git a/packages/code-du-travail-frontend/src/search/__tests__/Search.test.js b/packages/code-du-travail-frontend/src/search/__tests__/Search.test.js
index b68fc696fe..770b8988f6 100644
--- a/packages/code-du-travail-frontend/src/search/__tests__/Search.test.js
+++ b/packages/code-du-travail-frontend/src/search/__tests__/Search.test.js
@@ -35,6 +35,7 @@ describe("<search />", () => {
     await waitForElement(() => getAllByRole("option"));
     expect(container).toMatchSnapshot();
   });
+
   it("should not navigate when user change facet if query is empty", () => {
     const { getBySelectText } = renderWithMock(<Search />);
     const select = getBySelectText(/Tous contenus/i);
@@ -42,6 +43,14 @@ describe("<search />", () => {
     expect(Router.pushRoute).not.toHaveBeenCalled();
   });
 
+  it("should not navigate when user blur source facet", () => {
+    const { getBySelectText } = renderWithMock(<Search />, { query: { q } });
+    const select = getBySelectText(/Tous contenus/i);
+    fireEvent.focus(select);
+    fireEvent.blur(select);
+    expect(Router.pushRoute).not.toHaveBeenCalled();
+  });
+
   it("should navigate when user change facet if query is filled", () => {
     const { getBySelectText, getByLabelText } = renderWithMock(<Search />);
     const input = getByLabelText(/rechercher/i);