diff --git a/src/sys/wasi/mod.rs b/src/sys/wasi/mod.rs
index 596d365d9..e1169d28b 100644
--- a/src/sys/wasi/mod.rs
+++ b/src/sys/wasi/mod.rs
@@ -334,7 +334,7 @@ pub(crate) mod event {
             fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
                 f.debug_struct("EventFdReadwrite")
                     .field("nbytes", &self.0.nbytes)
-                    .field("flags", &self.0.flags)
+                    .field("flags", &EventrwflagsDetails(self.0.flags))
                     .finish()
             }
         }