diff --git a/Control/CxxUtils/share/ubsan.supp b/Control/CxxUtils/share/ubsan.supp
index 7055632d9a60d1532c20c06d1846dce17fe9f8f1..6f9cbf9f552682eccd60f3f4be7e742dcc02e9cd 100644
--- a/Control/CxxUtils/share/ubsan.supp
+++ b/Control/CxxUtils/share/ubsan.supp
@@ -2,3 +2,6 @@ vptr_check:sp_counted
 vptr_check:severity_level
 vptr_check:custom_scheduler
 
+# Implicit casts from hard symlinking.
+# PixelCluster, SCT_Cluster -> SiCluster
+vptr_check:PrepRawDataCollection