diff --git a/homeassistant/components/zha/config_flow.py b/homeassistant/components/zha/config_flow.py
index 473d39c6f7a..f59f53c7995 100644
--- a/homeassistant/components/zha/config_flow.py
+++ b/homeassistant/components/zha/config_flow.py
@@ -45,6 +45,10 @@ class ZhaFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
             + (f" - {p.manufacturer}" if p.manufacturer else "")
             for p in ports
         ]
+
+        if not list_of_ports:
+            return await self.async_step_pick_radio()
+
         list_of_ports.append(CONF_MANUAL_PATH)
 
         if user_input is not None:
diff --git a/tests/components/zha/test_config_flow.py b/tests/components/zha/test_config_flow.py
index fe65def839d..b3dbefbdbf0 100644
--- a/tests/components/zha/test_config_flow.py
+++ b/tests/components/zha/test_config_flow.py
@@ -74,6 +74,7 @@ async def test_user_flow_not_detected(detect_mock, hass):
     assert detect_mock.await_args[0][0] == port.device
 
 
+@patch("serial.tools.list_ports.comports", MagicMock(return_value=[com_port()]))
 async def test_user_flow_show_form(hass):
     """Test user step form."""
     result = await hass.config_entries.flow.async_init(
@@ -85,6 +86,17 @@ async def test_user_flow_show_form(hass):
     assert result["step_id"] == "user"
 
 
+async def test_user_flow_show_manual(hass):
+    """Test user flow manual entry when no comport detected."""
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN,
+        context={CONF_SOURCE: SOURCE_USER},
+    )
+
+    assert result["type"] == RESULT_TYPE_FORM
+    assert result["step_id"] == "pick_radio"
+
+
 async def test_user_flow_manual(hass):
     """Test user flow manual entry."""