diff --git a/docs/markdown/Syntax.md b/docs/markdown/Syntax.md
index 708fc25ae..2e85ca854 100644
--- a/docs/markdown/Syntax.md
+++ b/docs/markdown/Syntax.md
@@ -815,5 +815,5 @@ STRING_MULTILINE_VALUE: \.*?(''')\
 STRING_SIMPLE_VALUE: \.*?(?<!\\)(\\\\)*?'\
 subscript_expression: postfix_expression "[" expression "]"
 unary_expression: postfix_expression | (unary_operator unary_expression)
-unary_operator: "not" | "+" | "-"
+unary_operator: "not" | "-"
 ```