diff --git a/src/wifi/model/he/rr-multi-user-scheduler.cc b/src/wifi/model/he/rr-multi-user-scheduler.cc
index 5ddef77a0..66b3c4fda 100644
--- a/src/wifi/model/he/rr-multi-user-scheduler.cc
+++ b/src/wifi/model/he/rr-multi-user-scheduler.cc
@@ -144,7 +144,9 @@ RrMultiUserScheduler::SelectTxFormat()
         return SU_TX;
     }
 
-    if (m_enableUlOfdma && m_enableBsrp && (GetLastTxFormat(m_linkId) == DL_MU_TX || !mpdu))
+    if (m_enableUlOfdma && m_enableBsrp &&
+        (GetLastTxFormat(m_linkId) == DL_MU_TX ||
+         ((m_initialFrame || m_trigger.GetType() != TriggerFrameType::BSRP_TRIGGER) && !mpdu)))
     {
         TxFormat txFormat = TrySendingBsrpTf();