diff --git a/source/md.h b/source/md.h
index 0f418b8..d997a17 100644
--- a/source/md.h
+++ b/source/md.h
@@ -463,7 +463,7 @@ struct MD_Token
 
 typedef enum MD_MessageKind
 {
-    MD_MessageKind_None,
+    MD_MessageKind_Null,
     MD_MessageKind_Warning,
     MD_MessageKind_Error,
     MD_MessageKind_CatastrophicError,
@@ -495,23 +495,6 @@ typedef enum MD_ParseSetRule
 }
 MD_ParseSetRule;
 
-typedef MD_u32 MD_ParseSetFlags;
-enum
-{
-    MD_ParseSetFlag_Paren    = (1<<0),
-    MD_ParseSetFlag_Brace    = (1<<1),
-    MD_ParseSetFlag_Bracket  = (1<<2),
-    MD_ParseSetFlag_Implicit = (1<<3),
-    MD_ParseSetFlag_Global   = (1<<4),
-};
-
-typedef struct MD_Tokenizer MD_Tokenizer;
-struct MD_Tokenizer
-{
-    MD_String8 contents;
-    MD_u64 off;
-};
-
 typedef struct MD_ParseResult MD_ParseResult;
 struct MD_ParseResult
 {