diff --git a/llvm/lib/Target/NVPTX/MCTargetDesc/NVPTXInstPrinter.cpp b/llvm/lib/Target/NVPTX/MCTargetDesc/NVPTXInstPrinter.cpp
index 0f38f644e89af..65e1893d3f3bd 100644
--- a/llvm/lib/Target/NVPTX/MCTargetDesc/NVPTXInstPrinter.cpp
+++ b/llvm/lib/Target/NVPTX/MCTargetDesc/NVPTXInstPrinter.cpp
@@ -450,4 +450,6 @@ void NVPTXInstPrinter::printTmaReductionMode(const MCInst *MI, int OpNum,
     O << ".xor";
     return;
   }
+  llvm_unreachable(
+      "Invalid Reduction Op in printCpAsyncBulkTensorReductionMode");
 }