diff --git a/proxyclient/m1n1/fw/dcp/ipc.py b/proxyclient/m1n1/fw/dcp/ipc.py
index 7795b9c2..20880c0e 100644
--- a/proxyclient/m1n1/fw/dcp/ipc.py
+++ b/proxyclient/m1n1/fw/dcp/ipc.py
@@ -534,7 +534,7 @@ CompressionInfo = Struct(
     "pad2" / Padding(1),
 )
 
-assert PlaneInfo.sizeof() == 0x34
+assert CompressionInfo.sizeof() == 0x34
 
 IOSurface = Struct(
     "is_tiled" / bool_,