Index: include/lldb/Utility/FileSpec.h
===================================================================
--- include/lldb/Utility/FileSpec.h
+++ include/lldb/Utility/FileSpec.h
@@ -61,7 +61,7 @@
 //----------------------------------------------------------------------
 class FileSpec {
 public:
-  enum PathSyntax {
+  enum PathSyntax : unsigned char {
     ePathSyntaxPosix,
     ePathSyntaxWindows,
     ePathSyntaxHostNative