diff --git a/llvm/lib/Target/AMDGPU/AMDGPUMCInstLower.cpp b/llvm/lib/Target/AMDGPU/AMDGPUMCInstLower.cpp
index 1d8fc70fe3d3d4fb23b5c046a07450c6b84fd199..c15b37f9e9cd8d92a3313174ec3c94667ff841b7 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUMCInstLower.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUMCInstLower.cpp
@@ -230,7 +230,7 @@ void AMDGPUAsmPrinter::EmitInstruction(const MachineInstr *MI) {
         const MCSymbolRefExpr *Expr
           = MCSymbolRefExpr::create(MBB->getSymbol(), OutContext);
         Expr->print(Str, MAI);
-        OutStreamer->emitRawComment(" mask branch " + BBStr);
+        OutStreamer->emitRawComment(Twine(" mask branch ") + BBStr);
       }
 
       return;