diff --git a/gns3server/api/routes/controller/appliances.py b/gns3server/api/routes/controller/appliances.py
index 05fba4ad..c27f5a8f 100644
--- a/gns3server/api/routes/controller/appliances.py
+++ b/gns3server/api/routes/controller/appliances.py
@@ -47,7 +47,7 @@ router = APIRouter()
 @router.get("")
 async def get_appliances(
         update: Optional[bool] = False,
-        symbol_theme: Optional[str] = "Classic"
+        symbol_theme: Optional[str] = None
 ) -> List[schemas.Appliance]:
     """
     Return all appliances known by the controller.
@@ -56,7 +56,7 @@ async def get_appliances(
     controller = Controller.instance()
     if update:
         await controller.appliance_manager.download_appliances()
-    controller.appliance_manager.load_appliances(symbol_theme=symbol_theme)
+    controller.appliance_manager.load_appliances(symbol_theme)
     return [c.asdict() for c in controller.appliance_manager.appliances.values()]
 
 
diff --git a/gns3server/controller/appliance_manager.py b/gns3server/controller/appliance_manager.py
index e4bc72f1..85533106 100644
--- a/gns3server/controller/appliance_manager.py
+++ b/gns3server/controller/appliance_manager.py
@@ -281,7 +281,7 @@ class ApplianceManager:
             template_data = await self._appliance_to_template(appliance)
             await self._create_template(template_data, templates_repo, rbac_repo, current_user)
 
-    def load_appliances(self, symbol_theme: str = "Classic") -> None:
+    def load_appliances(self, symbol_theme: str = None) -> None:
         """
         Loads appliance files from disk.
         """
@@ -326,6 +326,8 @@ class ApplianceManager:
         from . import Controller
 
         controller = Controller.instance()
+        if not symbol_theme:
+            symbol_theme = controller.symbols.theme
         category = appliance["category"]
         if category == "guest":
             if "docker" in appliance:
diff --git a/gns3server/controller/symbols.py b/gns3server/controller/symbols.py
index 053d0ab3..b725c7c0 100644
--- a/gns3server/controller/symbols.py
+++ b/gns3server/controller/symbols.py
@@ -68,7 +68,7 @@ class Symbols:
 
         theme = self._themes.get(symbol_theme, None)
         if not theme:
-            log.warning(f"Could not find symbol theme '{self._current_theme}'")
+            log.warning(f"Could not find symbol theme '{symbol_theme}'")
             return None
         symbol_path = theme.get(symbol)
         if symbol_path not in self._symbols_path: