diff --git a/tokio-timer/src/timer/mod.rs b/tokio-timer/src/timer/mod.rs
index 1ebdb6241..89c5eb25e 100644
--- a/tokio-timer/src/timer/mod.rs
+++ b/tokio-timer/src/timer/mod.rs
@@ -478,6 +478,8 @@ where T: Park,
 
                 if deadline > now {
                     self.park.park_timeout(deadline - now)?;
+                } else {
+                    self.park.park_timeout(Duration::from_secs(0))?;
                 }
             }
             None => {
@@ -500,6 +502,8 @@ where T: Park,
 
                 if deadline > now {
                     self.park.park_timeout(cmp::min(deadline - now, duration))?;
+                } else {
+                    self.park.park_timeout(Duration::from_secs(0))?;
                 }
             }
             None => {