diff --git a/core/AmSipDialog.cpp b/core/AmSipDialog.cpp
index d42bd721..351e1d32 100644
--- a/core/AmSipDialog.cpp
+++ b/core/AmSipDialog.cpp
@@ -716,7 +716,7 @@ int AmSipDialog::send_200_ack(const AmSipTransaction& t,
   if (SipCtrlInterface::send(req))
     return -1;
 
-  uas_trans.erase(t.cseq);
+  uac_trans.erase(t.cseq);
 
   return 0;
 }