diff --git a/source/exec.tex b/source/exec.tex
index 8ea54f81d2..178d6cfe64 100644
--- a/source/exec.tex
+++ b/source/exec.tex
@@ -595,7 +595,7 @@
   inline constexpr just_error_t just_error{};
   inline constexpr just_stopped_t just_stopped{};
   inline constexpr schedule_t schedule{};
-  inline constexpr unspecified read{};
+  inline constexpr @\unspec@ read_env{};
 
   template<scheduler Sndr>
     using schedule_result_t = decltype(schedule(declval<Sndr>()));