diff --git a/http/httpguts/httplex.go b/http/httpguts/httplex.go
index e7de24ee6..3b8ab2d1e 100644
--- a/http/httpguts/httplex.go
+++ b/http/httpguts/httplex.go
@@ -14,6 +14,8 @@ import (
 
 var isTokenTable = [127]bool{
 	'!':  true,
+	'[':  true,
+	']':  true,
 	'#':  true,
 	'$':  true,
 	'%':  true,
diff --git a/http/httpguts/httplex_test.go b/http/httpguts/httplex_test.go
index a2c57f392..2353cb538 100644
--- a/http/httpguts/httplex_test.go
+++ b/http/httpguts/httplex_test.go
@@ -14,7 +14,7 @@ func isCtl(c rune) bool { return c <= 31 || c == 127 }
 
 func isSeparator(c rune) bool {
 	switch c {
-	case '(', ')', '<', '>', '@', ',', ';', ':', '\\', '"', '/', '[', ']', '?', '=', '{', '}', ' ', '\t':
+	case '(', ')', '<', '>', '@', ',', ';', ':', '\\', '"', '/', '?', '=', '{', '}', ' ', '\t':
 		return true
 	}
 	return false