diff --git a/src/iomux_impl.c b/src/iomux_impl.c
index e41cfa1..ae3a083 100644
--- a/src/iomux_impl.c
+++ b/src/iomux_impl.c
@@ -151,7 +151,6 @@ int iomux_update_events(struct IOMux *mux, struct IOMuxFD *fd, unsigned int what
     if (fd->what != what) {
         fd->what = what;
         rc = mux->ops.update_events_impl(mux, fd);
-        fd->what = what;
     }
 
     return rc;