diff --git a/clang/utils/TableGen/RISCVVEmitter.cpp b/clang/utils/TableGen/RISCVVEmitter.cpp
--- a/clang/utils/TableGen/RISCVVEmitter.cpp
+++ b/clang/utils/TableGen/RISCVVEmitter.cpp
@@ -1184,7 +1184,7 @@
     }
 
     if (HasPolicy) {
-      ProtoMaskSeq.push_back("z");
+      ProtoMaskSeq.push_back("Kz");
     }
 
     // Create Intrinsics for each type and LMUL.