diff --git a/aiohttp_devtools/runserver/serve.py b/aiohttp_devtools/runserver/serve.py
index ec265043..396387b8 100644
--- a/aiohttp_devtools/runserver/serve.py
+++ b/aiohttp_devtools/runserver/serve.py
@@ -222,7 +222,11 @@ async def src_reload(app: web.Application, path: Optional[str] = None) -> int:
 
     is_html = None
     if path:
-        path = str(Path(app[STATIC_URL]) / Path(path).relative_to(app[STATIC_PATH]))
+        try:
+            path = str(Path(app[STATIC_URL]) / Path(path).relative_to(app[STATIC_PATH]))
+        except ValueError as e:
+            aux_logger.warning('error resolving relative path: %s', e)
+            return 0
         is_html = mimetypes.guess_type(path)[0] == 'text/html'
 
     reloads = 0
diff --git a/tests/test_runserver_serve.py b/tests/test_runserver_serve.py
index e577ed31..8fac1fd9 100644
--- a/tests/test_runserver_serve.py
+++ b/tests/test_runserver_serve.py
@@ -84,6 +84,18 @@ async def test_aux_reload_html_different():
     assert ws.send_str.call_count == 0
 
 
+async def test_aux_reload_no_static_path():
+    aux_app = Application()
+    ws = MagicMock()
+    ws.send_str = MagicMock(return_value=create_future())
+    aux_app[LAST_RELOAD] = [0, 0.]
+    aux_app[STATIC_PATH] = "."
+    aux_app[STATIC_URL] = "/static/"
+    aux_app[WS] = set(((ws, "/foo/bar"),))  # type: ignore[misc]
+    assert 0 == await src_reload(aux_app, '/path/to/static_files/foo/.bar.html.kate-swp')
+    assert ws.send_str.call_count == 0
+
+
 async def test_aux_reload_runtime_error(smart_caplog):
     aux_app = Application()
     ws = MagicMock()