diff --git a/src/lib.rs b/src/lib.rs
index 51351d3..72aa322 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -13,7 +13,7 @@ use parking_lot::RwLock;
 use serde::{Deserialize, Serialize};
 
 bitflags! {
-    #[derive(Serialize, Deserialize, Clone, Copy)]
+    #[derive(Serialize, Deserialize, Clone, Copy, Debug)]
     pub struct PollEvents: u16 {
         const POLLIN = 1<<0 | 1<<1;
         const POLLRDNORM = 1<<0;