diff --git a/src/AsyncEngine.cc b/src/AsyncEngine.cc
deleted file mode 100644
index 2b934472e35..00000000000
--- a/src/AsyncEngine.cc
+++ /dev/null
@@ -1,11 +0,0 @@
-/*
- * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
- *
- * Squid software is distributed under GPLv2+ license and includes
- * contributions from numerous individuals and organizations.
- * Please see the COPYING and CONTRIBUTORS files for details.
- */
-
-#include "squid.h"
-#include "AsyncEngine.h"
-
diff --git a/src/EventLoop.cc b/src/EventLoop.cc
index 00920c732dd..b744e170a83 100644
--- a/src/EventLoop.cc
+++ b/src/EventLoop.cc
@@ -9,8 +9,8 @@
 /* DEBUG: section 01    Main Loop */
 
 #include "squid.h"
-#include "AsyncEngine.h"
 #include "base/AsyncCallQueue.h"
+#include "base/AsyncEngine.h"
 #include "debug/Stream.h"
 #include "EventLoop.h"
 #include "fatal.h"
diff --git a/src/Makefile.am b/src/Makefile.am
index 8058f776085..8f7026a60b6 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -195,8 +195,6 @@ squid_SOURCES = \
 	$(WINSVC_SOURCE) \
 	AccessLogEntry.cc \
 	AccessLogEntry.h \
-	AsyncEngine.cc \
-	AsyncEngine.h \
 	AuthReg.h \
 	BodyPipe.cc \
 	BodyPipe.h \
diff --git a/src/adaptation/ecap/ServiceRep.cc b/src/adaptation/ecap/ServiceRep.cc
index dac4a1f92d7..b6a8a456ac5 100644
--- a/src/adaptation/ecap/ServiceRep.cc
+++ b/src/adaptation/ecap/ServiceRep.cc
@@ -13,7 +13,7 @@
 #include "adaptation/ecap/Host.h"
 #include "adaptation/ecap/ServiceRep.h"
 #include "adaptation/ecap/XactionRep.h"
-#include "AsyncEngine.h"
+#include "base/AsyncEngine.h"
 #include "base/TextException.h"
 #include "debug/Stream.h"
 #include "EventLoop.h"
diff --git a/src/AsyncEngine.h b/src/base/AsyncEngine.h
similarity index 100%
rename from src/AsyncEngine.h
rename to src/base/AsyncEngine.h
diff --git a/src/base/Makefile.am b/src/base/Makefile.am
index ba18de1f8cc..249904f126a 100644
--- a/src/base/Makefile.am
+++ b/src/base/Makefile.am
@@ -20,6 +20,7 @@ libbase_la_SOURCES = \
 	AsyncCallQueue.h \
 	AsyncCallbacks.h \
 	AsyncCbdataCalls.h \
+	AsyncEngine.h \
 	AsyncFunCalls.h \
 	AsyncJob.cc \
 	AsyncJob.h \
diff --git a/src/event.h b/src/event.h
index d93e5fbee15..edee17e6cb5 100644
--- a/src/event.h
+++ b/src/event.h
@@ -9,7 +9,7 @@
 #ifndef SQUID_EVENT_H
 #define SQUID_EVENT_H
 
-#include "AsyncEngine.h"
+#include "base/AsyncEngine.h"
 #include "base/Packable.h"
 #include "mem/forward.h"
 
diff --git a/src/tests/testEventLoop.cc b/src/tests/testEventLoop.cc
index 65ea78f9e91..ac97f0e617c 100644
--- a/src/tests/testEventLoop.cc
+++ b/src/tests/testEventLoop.cc
@@ -7,7 +7,7 @@
  */
 
 #include "squid.h"
-#include "AsyncEngine.h"
+#include "base/AsyncEngine.h"
 #include "compat/cppunit.h"
 #include "EventLoop.h"
 #include "time/Engine.h"