diff --git a/clang/lib/Headers/cpuid.h b/clang/lib/Headers/cpuid.h
index 5d262a60735f2..caa0069c2e1fa 100644
--- a/clang/lib/Headers/cpuid.h
+++ b/clang/lib/Headers/cpuid.h
@@ -232,6 +232,7 @@
 
 /* Features in %ebx for leaf 0x80000008 */
 #define bit_CLZERO      0x00000001
+#define bit_RDPRU       0x00000010
 #define bit_WBNOINVD    0x00000200
 
 
diff --git a/llvm/lib/Support/Host.cpp b/llvm/lib/Support/Host.cpp
index c97f273b07398..94a1536f46900 100644
--- a/llvm/lib/Support/Host.cpp
+++ b/llvm/lib/Support/Host.cpp
@@ -1734,6 +1734,7 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
   bool HasExtLeaf8 = MaxExtLevel >= 0x80000008 &&
                      !getX86CpuIDAndInfo(0x80000008, &EAX, &EBX, &ECX, &EDX);
   Features["clzero"]   = HasExtLeaf8 && ((EBX >> 0) & 1);
+  Features["rdpru"]    = HasExtLeaf8 && ((EBX >> 4) & 1);
   Features["wbnoinvd"] = HasExtLeaf8 && ((EBX >> 9) & 1);
 
   bool HasLeaf7 =