diff --git a/devices/clients/SDP_statistics.py b/devices/clients/SDP_statistics.py
index b8417ef58876b2fbad65bdf0771a830237233ae0..fbfc0e38d1ef1d845ef4bd63a63e2d0844be29eb 100644
--- a/devices/clients/SDP_statistics.py
+++ b/devices/clients/SDP_statistics.py
@@ -36,7 +36,7 @@ class StatisticsPacket(object):
     def expected_size(self) -> int:
         """ The size this packet should be (header + payload), according to the header. """
 
-        return 78 + self.nof_statistics_per_packet * self.nof_bytes_per_statistic
+        return 32 + self.nof_statistics_per_packet * self.nof_bytes_per_statistic
 
     @property
     def marker(self) -> str: