diff --git a/rust-semantics/preprocessing/constants.md b/rust-semantics/preprocessing/constants.md
index 289ac25..8d1a21a 100644
--- a/rust-semantics/preprocessing/constants.md
+++ b/rust-semantics/preprocessing/constants.md
@@ -29,7 +29,7 @@ module RUST-CONSTANTS
         <constant-name> Name </constant-name>
         <constant-value> V:Value </constant-value>
 
-    rule <k> Name:Identifier::I:Identifier::.PathExprSegments => V ... </k>
+    rule <k> Name:Identifier::_:Identifier::.PathExprSegments => V ... </k>
         <constant-name> Name </constant-name>
         <constant-value> V:Value </constant-value>