diff --git a/examples/intro-timer.hpp b/examples/intro-timer.hpp
index 5a6d3b10..a81ffe6e 100644
--- a/examples/intro-timer.hpp
+++ b/examples/intro-timer.hpp
@@ -7,6 +7,7 @@
 #define INCLUDED_EXAMPLES_INTRO_TIMER
 
 #include <beman/execution/execution.hpp>
+#include <chrono>
 #include <queue>
 #include <thread>
 #include <tuple>
diff --git a/include/beman/execution/detail/when_all.hpp b/include/beman/execution/detail/when_all.hpp
index dfb16b67..0af45779 100644
--- a/include/beman/execution/detail/when_all.hpp
+++ b/include/beman/execution/detail/when_all.hpp
@@ -122,7 +122,7 @@ struct impls_for<::beman::execution::detail::when_all_t> : ::beman::execution::d
         }
 
         void complete(Receiver& recvr) noexcept {
-            switch (this->disp) {
+            switch (disposition(this->disp)) {
             case disposition::started: {
                 auto tie = []<typename... T>(::std::tuple<T...>& t) noexcept {
                     return ::std::apply([](auto&... a) { return ::std::tie(a...); }, t);