diff --git a/source/meta.tex b/source/meta.tex
index e848e048f8..d89ce81cf0 100644
--- a/source/meta.tex
+++ b/source/meta.tex
@@ -169,7 +169,7 @@
   template<class T>
     struct @\exposidnc{cw-fixed-value}@;                                      // \expos
 
-  template<@\exposidnc{cw-fixed-value}@ X, class = typename decltype(@\exposid{cw-fixed-value}@(X))::@\exposid{type}@>
+  template<@\exposidnc{cw-fixed-value}@ X, class = typename decltype(X)::@\exposid{type}@>
     struct constant_wrapper;
 
   template<class T>