diff --git a/lldb/source/DataFormatters/TypeSummary.cpp b/lldb/source/DataFormatters/TypeSummary.cpp
index 2c863b364538..18bf81aedf2c 100644
--- a/lldb/source/DataFormatters/TypeSummary.cpp
+++ b/lldb/source/DataFormatters/TypeSummary.cpp
@@ -59,6 +59,7 @@ std::string TypeSummaryImpl::GetSummaryKindName() {
   case Kind::eBytecode:
     return "bytecode";
   }
+  llvm_unreachable("Unknown type kind name");
 }
 
 StringSummaryFormat::StringSummaryFormat(const TypeSummaryImpl::Flags &flags,
diff --git a/lldb/source/ValueObject/DILLexer.cpp b/lldb/source/ValueObject/DILLexer.cpp
index c7acfec347af..1f013288c839 100644
--- a/lldb/source/ValueObject/DILLexer.cpp
+++ b/lldb/source/ValueObject/DILLexer.cpp
@@ -30,6 +30,7 @@ llvm::StringRef Token::GetTokenName(Kind kind) {
   case Kind::r_paren:
     return "r_paren";
   }
+  llvm_unreachable("Unknown token name");
 }
 
 static bool IsLetter(char c) {