diff --git a/sentry-core/src/performance/mod.rs b/sentry-core/src/performance/mod.rs
index 835adb52..60ba6812 100644
--- a/sentry-core/src/performance/mod.rs
+++ b/sentry-core/src/performance/mod.rs
@@ -753,9 +753,8 @@ impl<'a> TransactionData<'a> {
     /// Iterate over the [data attributes](protocol::TraceContext::data)
     /// associated with this [transaction][protocol::Transaction].
     ///
-    /// If the transaction is not sampled for sending,
-    /// the metadata will not be populated at all,
-    /// so the produced iterator is empty.
+    /// If no client was bound when the transaction was started,
+    /// the produced iterator is empty.
     pub fn iter(&self) -> Box<dyn Iterator<Item = (&String, &protocol::Value)> + '_> {
         if self.0.transaction.is_some() {
             Box::new(self.0.context.data.iter())