diff --git a/llvm/lib/Support/Host.cpp b/llvm/lib/Support/Host.cpp
index 6b8f7ca..f236456 100644
--- a/llvm/lib/Support/Host.cpp
+++ b/llvm/lib/Support/Host.cpp
@@ -1478,6 +1478,7 @@
   Features["enqcmd"]          = HasLeaf7 && ((ECX >> 29) & 1);
 
   Features["serialize"]       = HasLeaf7 && ((EDX >> 14) & 1);
+  Features["tsxldtrk"]        = HasLeaf7 && ((EDX >> 16) & 1);
   // There are two CPUID leafs which information associated with the pconfig
   // instruction:
   // EAX=0x7, ECX=0x0 indicates the availability of the instruction (via the 18th