diff --git a/lib/InterfaceStub/IFSStub.cpp b/lib/InterfaceStub/IFSStub.cpp
index 24c29f3db5b..bbc91ada1de 100644
--- a/lib/InterfaceStub/IFSStub.cpp
+++ b/lib/InterfaceStub/IFSStub.cpp
@@ -64,8 +64,8 @@ uint8_t ifs::convertIFSBitWidthToELF(IFSBitWidthType BitWidth) {
     return ELF::ELFCLASS32;
   case IFSBitWidthType::IFS64:
     return ELF::ELFCLASS64;
-  case IFSBitWidthType::Unknown:
-    llvm_unreachable("unkown bitwidth");
+  default:
+    llvm_unreachable("unknown bitwidth");
   }
 }
 
@@ -75,7 +75,7 @@ uint8_t ifs::convertIFSEndiannessToELF(IFSEndiannessType Endianness) {
     return ELF::ELFDATA2LSB;
   case IFSEndiannessType::Big:
     return ELF::ELFDATA2MSB;
-  case IFSEndiannessType::Unknown:
+  default:
     llvm_unreachable("unknown endianness");
   }
 }