diff --git a/qspectrumanalyzer/data.py b/qspectrumanalyzer/data.py
index bb0c385..446e903 100644
--- a/qspectrumanalyzer/data.py
+++ b/qspectrumanalyzer/data.py
@@ -105,6 +105,10 @@ class DataStorage(QtCore.QObject):
 
     def update(self, data):
         """Update data storage"""
+        if self.y is not None and len(data["y"]) != len(self.y):
+          print("{:d} bins coming from backend, expected {:d}".format(len(data["y"]), len(self.y)))
+          return
+
         self.average_counter += 1
 
         if self.x is None: