diff --git a/zenoh/src/api/key_expr.rs b/zenoh/src/api/key_expr.rs
index 8b11472dfb..0f0d13a69c 100644
--- a/zenoh/src/api/key_expr.rs
+++ b/zenoh/src/api/key_expr.rs
@@ -551,7 +551,7 @@ impl<'a> KeyExpr<'a> {
 
 impl<'a> UndeclarableSealed<&'a Session> for KeyExpr<'a> {
     type Undeclaration = KeyExprUndeclaration<'a>;
-    
+
     fn undeclare_inner(self, session: &'a Session) -> Self::Undeclaration {
         KeyExprUndeclaration {
             session,