diff --git a/VersionedMap.cpp b/VersionedMap.cpp
index 3bd04af..933da46 100644
--- a/VersionedMap.cpp
+++ b/VersionedMap.cpp
@@ -962,6 +962,10 @@ struct __attribute__((__visibility__("hidden"))) VersionedMap::Impl {
     }
     roots.add(latestRoot, latestVersion);
     totalMallocBytes += mallocBytesDelta;
+
+    // Check the "latestRoot is only meaningful in the callstack of
+    // addMutations" property
+    VALGRIND_MAKE_MEM_UNDEFINED(&latestRoot, sizeof(latestRoot));
   }
 
   struct StepwiseFirstGeq {