diff --git a/LEGO1/lego/legoomni/src/video/legovideomanager.cpp b/LEGO1/lego/legoomni/src/video/legovideomanager.cpp
index 43cdde24..68cca603 100644
--- a/LEGO1/lego/legoomni/src/video/legovideomanager.cpp
+++ b/LEGO1/lego/legoomni/src/video/legovideomanager.cpp
@@ -10,6 +10,7 @@
 
 DECOMP_SIZE_ASSERT(LegoVideoManager, 0x590);
 DECOMP_SIZE_ASSERT(MxStopWatch, 0x18);
+DECOMP_SIZE_ASSERT(MxFrequencyMeter, 0x20);
 
 // FUNCTION: LEGO1 0x1007aa20
 LegoVideoManager::LegoVideoManager()