diff --git a/runtime/syntax/tex.yaml b/runtime/syntax/tex.yaml
index 3fcdbcbc..8c62986b 100644
--- a/runtime/syntax/tex.yaml
+++ b/runtime/syntax/tex.yaml
@@ -23,7 +23,7 @@ rules:
     - statement: "\\\\%"
     # comments
     - comment:
-        start: "[^\\\\]%"
+        start: "[^\\\\]%|^%"
         end: "$"
         rules: []
     - comment: