diff --git a/src/Lean/Parser/Syntax.lean b/src/Lean/Parser/Syntax.lean
index 8dcf6336a0..c2e3323936 100644
--- a/src/Lean/Parser/Syntax.lean
+++ b/src/Lean/Parser/Syntax.lean
@@ -30,7 +30,7 @@ namespace Syntax
 @[builtinSyntaxParser] def unary           := parser! ident >> checkNoWsBefore >> "(" >> many1 syntaxParser >> ")"
 @[builtinSyntaxParser] def binary          := parser! ident >> checkNoWsBefore >> "(" >> many1 syntaxParser >> ", " >> many1 syntaxParser >> ")"
 @[builtinSyntaxParser] def atom            := parser! strLit
-@[builtinSyntaxParser] def nonReserved     := parser! "!" >> strLit
+@[builtinSyntaxParser] def nonReserved     := parser! "&" >> strLit
 
 end Syntax
 
diff --git a/tests/lean/nonReserved.lean b/tests/lean/nonReserved.lean
index 7f2ddae9b2..35de65221f 100644
--- a/tests/lean/nonReserved.lean
+++ b/tests/lean/nonReserved.lean
@@ -1,4 +1,4 @@
-syntax "foo" !"bla" term : term
+syntax "foo" &"bla" term : term
 
 macro_rules
   | `(foo bla $x) => x