diff --git a/homeassistant/components/mullvad/config_flow.py b/homeassistant/components/mullvad/config_flow.py
index 55957f160a3..0ffcc11c97e 100644
--- a/homeassistant/components/mullvad/config_flow.py
+++ b/homeassistant/components/mullvad/config_flow.py
@@ -1,5 +1,7 @@
 """Config flow for Mullvad VPN integration."""
 
+from typing import Any
+
 from mullvad_api import MullvadAPI, MullvadAPIError
 
 from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
@@ -12,10 +14,10 @@ class MullvadConfigFlow(ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    async def async_step_user(self, user_input=None) -> ConfigFlowResult:
+    async def async_step_user(
+        self, user_input: dict[str, Any] | None = None
+    ) -> ConfigFlowResult:
         """Handle the initial step."""
-        self._async_abort_entries_match()
-
         errors = {}
         if user_input is not None:
             try:
diff --git a/homeassistant/components/mullvad/manifest.json b/homeassistant/components/mullvad/manifest.json
index 13dd27375cf..fc3faefe1e3 100644
--- a/homeassistant/components/mullvad/manifest.json
+++ b/homeassistant/components/mullvad/manifest.json
@@ -5,5 +5,6 @@
   "config_flow": true,
   "documentation": "https://www.home-assistant.io/integrations/mullvad",
   "iot_class": "cloud_polling",
-  "requirements": ["mullvad-api==1.0.0"]
+  "requirements": ["mullvad-api==1.0.0"],
+  "single_config_entry": true
 }
diff --git a/homeassistant/components/mullvad/strings.json b/homeassistant/components/mullvad/strings.json
index 3e029184155..d3f757e829c 100644
--- a/homeassistant/components/mullvad/strings.json
+++ b/homeassistant/components/mullvad/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "already_configured": "[%key:common::config_flow::abort::already_configured_device%]"
-    },
     "error": {
       "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
       "unknown": "[%key:common::config_flow::error::unknown%]"
diff --git a/homeassistant/generated/integrations.json b/homeassistant/generated/integrations.json
index 7c068de51ba..c30f22acc6e 100644
--- a/homeassistant/generated/integrations.json
+++ b/homeassistant/generated/integrations.json
@@ -3815,7 +3815,8 @@
       "name": "Mullvad VPN",
       "integration_type": "hub",
       "config_flow": true,
-      "iot_class": "cloud_polling"
+      "iot_class": "cloud_polling",
+      "single_config_entry": true
     },
     "mutesync": {
       "name": "mutesync",
diff --git a/tests/components/mullvad/test_config_flow.py b/tests/components/mullvad/test_config_flow.py
index e1e6570fa67..da9ce91eeed 100644
--- a/tests/components/mullvad/test_config_flow.py
+++ b/tests/components/mullvad/test_config_flow.py
@@ -51,7 +51,7 @@ async def test_form_user_only_once(hass: HomeAssistant) -> None:
         DOMAIN, context={"source": config_entries.SOURCE_USER}
     )
     assert result["type"] == FlowResultType.ABORT
-    assert result["reason"] == "already_configured"
+    assert result["reason"] == "single_instance_allowed"
 
 
 async def test_connection_error(hass: HomeAssistant) -> None: