diff --git a/gns3server/compute/qemu/qemu_vm.py b/gns3server/compute/qemu/qemu_vm.py
index 15ad6834..b790bab8 100644
--- a/gns3server/compute/qemu/qemu_vm.py
+++ b/gns3server/compute/qemu/qemu_vm.py
@@ -829,20 +829,26 @@ class QemuVM(BaseNode):
                                                                                         id=self._id,
                                                                                         options=options))
 
-        if not sys.platform.startswith("linux"):
-            if "-no-kvm" in options:
-                options = options.replace("-no-kvm", "")
-            if "-enable-kvm" in options:
+        # "-no-kvm" and "-no-hax' are deprecated since Qemu v5.2
+        if "-no-kvm" in options:
+            options = options.replace("-no-kvm", "-machine accel=tcg")
+        if "-no-hax" in options:
+            options = options.replace("-no-hax", "-machine accel=tcg")
+
+        if "-enable-kvm" in options:
+            if not sys.platform.startswith("linux"):
+                # KVM can only be enabled on Linux
                 options = options.replace("-enable-kvm", "")
-        else:
-            if "-no-hax" in options:
-                options = options.replace("-no-hax", "")
-            if "-enable-hax" in options:
+            else:
+                options = options.replace("-enable-kvm", "-machine accel=kvm")
+
+        if "-enable-hax" in options:
+            if not sys.platform.startswith("win"):
+                # HAXM is only available on Windows
                 options = options.replace("-enable-hax", "")
-            if "-icount" in options and ("-no-kvm" not in options):
-                # automatically add the -no-kvm option if -icount is detected
-                # to help with the migration of ASA VMs created before version 1.4
-                options = "-no-kvm " + options
+            else:
+                options = options.replace("-enable-hax", "-machine accel=hax")
+
         self._options = options.strip()
 
     @property
@@ -2078,7 +2084,7 @@ class QemuVM(BaseNode):
             if require_kvm is not None:
                 require_hardware_accel = require_kvm
 
-        if enable_hardware_accel and "-no-kvm" not in options and "-no-hax" not in options:
+        if enable_hardware_accel and "-machine accel=tcg" not in options:
             # Turn OFF hardware acceleration for non x86 architectures
             if sys.platform.startswith("win"):
                 supported_binaries = ["qemu-system-x86_64.exe", "qemu-system-x86_64w.exe", "qemu-system-i386.exe", "qemu-system-i386w.exe"]
diff --git a/gns3server/handlers/api/compute/qemu_handler.py b/gns3server/handlers/api/compute/qemu_handler.py
index d70e8a3f..0952da09 100644
--- a/gns3server/handlers/api/compute/qemu_handler.py
+++ b/gns3server/handlers/api/compute/qemu_handler.py
@@ -207,7 +207,7 @@ class QEMUHandler:
             enable_kvm = qemu_manager.config.get_section_config("Qemu").getboolean("enable_kvm")
             if enable_kvm is not None:
                 hardware_accel = enable_kvm
-        if hardware_accel and "-no-kvm" not in vm.options and "-no-hax" not in vm.options:
+        if hardware_accel and "-machine accel=tcg" not in vm.options:
             pm = ProjectManager.instance()
             if pm.check_hardware_virtualization(vm) is False:
                 raise aiohttp.web.HTTPConflict(text="Cannot start VM with hardware acceleration (KVM/HAX) enabled because hardware virtualization (VT-x/AMD-V) is already used by another software like VMware or VirtualBox")