diff --git a/src/cart/utils/memcheck-cart.supp b/src/cart/utils/memcheck-cart.supp
index 4771f022302..b29fbe80ace 100644
--- a/src/cart/utils/memcheck-cart.supp
+++ b/src/cart/utils/memcheck-cart.supp
@@ -486,6 +486,13 @@
    fun:_ZN6__tsan9ShadowSetEPNS_9RawShadowES1_S0_
    fun:racecall
 }
+{
+   MemoryRangeSet ShadowSet
+   Memcheck:Value8
+   fun:ShadowSet
+   fun:_ZN6__tsanL14MemoryRangeSetEmmNS_9RawShadowE
+   fun:racecall
+}
 {
    FI leak 8
    Memcheck:Leak