diff --git a/src/main/java/com/github/rholder/retry/BlockStrategies.java b/src/main/java/com/github/rholder/retry/BlockStrategies.java
index 6b2cdb2..889fbe6 100644
--- a/src/main/java/com/github/rholder/retry/BlockStrategies.java
+++ b/src/main/java/com/github/rholder/retry/BlockStrategies.java
@@ -43,7 +43,10 @@ private static class ThreadSleepStrategy implements BlockStrategy {
 
         @Override
         public void block(long sleepTime) throws InterruptedException {
+            if (sleepTime == 0L) {
+                return;
+            }
             Thread.sleep(sleepTime);
         }
     }
-}
\ No newline at end of file
+}