diff --git a/proxy/http/HttpSM.cc b/proxy/http/HttpSM.cc
index ff510b4a84f..3ffaa6639cc 100644
--- a/proxy/http/HttpSM.cc
+++ b/proxy/http/HttpSM.cc
@@ -5039,8 +5039,7 @@ HttpSM::do_http_server_open(bool raw)
     shared_result = httpSessionManager.acquire_session(this,                                 // state machine
                                                        &t_state.current.server->dst_addr.sa, // ip + port
                                                        t_state.current.server->name,         // hostname
-                                                       ua_txn,                               // has ptr to bound ua sessions
-                                                       this                                  // sm
+                                                       ua_txn                                // has ptr to bound ua sessions
     );
 
     switch (shared_result) {
diff --git a/proxy/http/HttpSessionManager.cc b/proxy/http/HttpSessionManager.cc
index 4f7fabbe3de..dd6897c73f9 100644
--- a/proxy/http/HttpSessionManager.cc
+++ b/proxy/http/HttpSessionManager.cc
@@ -333,8 +333,7 @@ HttpSessionManager::purge_keepalives()
 }
 
 HSMresult_t
-HttpSessionManager::acquire_session(Continuation * /* cont ATS_UNUSED */, sockaddr const *ip, const char *hostname,
-                                    ProxyTransaction *ua_txn, HttpSM *sm)
+HttpSessionManager::acquire_session(HttpSM *sm, sockaddr const *ip, const char *hostname, ProxyTransaction *ua_txn)
 {
   PoolableSession *to_return = nullptr;
   TSServerSessionSharingMatchMask match_style =
diff --git a/proxy/http/HttpSessionManager.h b/proxy/http/HttpSessionManager.h
index 45344582247..b8ed65b75aa 100644
--- a/proxy/http/HttpSessionManager.h
+++ b/proxy/http/HttpSessionManager.h
@@ -110,7 +110,7 @@ class HttpSessionManager
 public:
   HttpSessionManager() {}
   ~HttpSessionManager() {}
-  HSMresult_t acquire_session(Continuation *cont, sockaddr const *addr, const char *hostname, ProxyTransaction *ua_txn, HttpSM *sm);
+  HSMresult_t acquire_session(HttpSM *sm, sockaddr const *addr, const char *hostname, ProxyTransaction *ua_txn);
   HSMresult_t release_session(PoolableSession *to_release);
   void purge_keepalives();
   void init();