diff --git a/enzyme/Enzyme/ActivityAnalysis.cpp b/enzyme/Enzyme/ActivityAnalysis.cpp
index ef93a7e16aaf..dd7eb3a3e5ba 100644
--- a/enzyme/Enzyme/ActivityAnalysis.cpp
+++ b/enzyme/Enzyme/ActivityAnalysis.cpp
@@ -165,6 +165,8 @@ const std::set<std::string> InactiveGlobals = {
     // stringstream
     "_ZTVNSt7__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEEE",
     "_ZTTNSt7__cxx1118basic_stringstreamIcSt11char_traitsIcESaIcEEE",
+    // vtable for __cxxabiv1::__si_class_type_info
+    "_ZTVN10__cxxabiv120__si_class_type_infoE"
 };
 
 const std::map<std::string, size_t> MPIInactiveCommAllocators = {