diff --git a/stdx/d/lexer.d b/stdx/d/lexer.d
index cbff766..2b355e0 100644
--- a/stdx/d/lexer.d
+++ b/stdx/d/lexer.d
@@ -399,8 +399,8 @@ public struct DLexer
 {
 	import core.vararg;
 
-	mixin Lexer!(IdType, Token, lexIdentifier, isSeparating, operators,
-		dynamicTokens, pseudoTokenHandlers, keywords);
+	mixin Lexer!(Token, lexIdentifier, isSeparating, pseudoTokenHandlers,
+		operators, dynamicTokens, keywords);
 
 	this(ubyte[] range, const LexerConfig config, StringCache* cache)
 	{
diff --git a/stdx/lexer.d b/stdx/lexer.d
index 541f739..7ab33ff 100644
--- a/stdx/lexer.d
+++ b/stdx/lexer.d
@@ -368,10 +368,11 @@ public:
  * }
  * ---
  */
-mixin template Lexer(IDType, Token, alias defaultTokenFunction,
-	alias tokenSeparatingFunction, alias staticTokens, alias dynamicTokens,
-	alias tokenHandlers, alias possibleDefaultTokens)
+mixin template Lexer(Token, alias defaultTokenFunction,
+	alias tokenSeparatingFunction, alias tokenHandlers,
+	alias staticTokens, alias dynamicTokens, alias possibleDefaultTokens)
 {
+	alias IDType = typeof(Token.type);
 
 	static assert (tokenHandlers.length % 2 == 0, "Each pseudo-token must"
 		~ " have a corresponding handler function name.");