diff --git a/src/endpoints/bettwaage.py b/src/endpoints/bettwaage.py
index cc319c5..a243b28 100644
--- a/src/endpoints/bettwaage.py
+++ b/src/endpoints/bettwaage.py
@@ -73,6 +73,8 @@ async def add_weight(tl: int, tr: int, bl: int, br: int):
 
 @router.post("/latest")
 async def get_latest():
+    if not latest_values:
+        return HTMLResponse(status_code=200, content="No data given yet")
     total = sum(latest_values)
     return JSONResponse(
         {