diff --git a/adafruit_pm25/__init__.py b/adafruit_pm25/__init__.py
index 98ae61a..80425e9 100644
--- a/adafruit_pm25/__init__.py
+++ b/adafruit_pm25/__init__.py
@@ -97,7 +97,6 @@ def read(self):
             raise RuntimeError("Invalid PM2.5 checksum")
 
         # unpack data
-        frame = struct.unpack(">HHHHHHHHHHHH", self._buffer[4:28])
         (
             self.aqi_reading["pm10 standard"],
             self.aqi_reading["pm25 standard"],
@@ -111,6 +110,6 @@ def read(self):
             self.aqi_reading["particles 25um"],
             self.aqi_reading["particles 50um"],
             self.aqi_reading["particles 100um"],
-        ) = frame
+        ) = struct.unpack(">HHHHHHHHHHHH", self._buffer[4:28])
 
         return self.aqi_reading