diff --git a/lib/Target/Hexagon/MCTargetDesc/HexagonInstPrinter.cpp b/lib/Target/Hexagon/MCTargetDesc/HexagonInstPrinter.cpp
index dd4da9ed870..dcb9ecdf69a 100644
--- a/lib/Target/Hexagon/MCTargetDesc/HexagonInstPrinter.cpp
+++ b/lib/Target/Hexagon/MCTargetDesc/HexagonInstPrinter.cpp
@@ -210,7 +210,7 @@ void HexagonInstPrinter::printSymbol(MCInst const *MI, unsigned OpNo,
     printOperand(MI, OpNo, O);
   } else {
     printOperand(MI, OpNo, O);
-    assert(!"Unknown symbol operand");
+    llvm_unreachable("Unknown symbol operand");
   }
   O << ')';
 }