diff --git a/runtime/syntax/go.yaml b/runtime/syntax/go.yaml
index 44bd570d..e8c2a327 100644
--- a/runtime/syntax/go.yaml
+++ b/runtime/syntax/go.yaml
@@ -17,7 +17,7 @@ rules:
     - statement: "!"
     - statement: ","
     - constant.number: "\\b([0-9]+|0x[0-9a-fA-F]*)\\b"
-    - constant.specialChar: "([0-7]{3|x[A-Fa-f0-9]{2}|u[A-Fa-f0-9]{4}|U[A-Fa-f0-9]{8})"
+    - constant.specialChar: "\\([0-7]{3|x[A-Fa-f0-9]{2}|u[A-Fa-f0-9]{4}|U[A-Fa-f0-9]{8})"
 
     - comment:
         start: "//"