diff --git a/maestro-common/src/main/java/com/netflix/maestro/models/instance/ForeachDetails.java b/maestro-common/src/main/java/com/netflix/maestro/models/instance/ForeachDetails.java
index 3a4b28b7..f3a13cc3 100644
--- a/maestro-common/src/main/java/com/netflix/maestro/models/instance/ForeachDetails.java
+++ b/maestro-common/src/main/java/com/netflix/maestro/models/instance/ForeachDetails.java
@@ -103,7 +103,7 @@ public Interval deserialize(JsonParser p, DeserializationContext ctxt) throws IO
   }
 
   private static int intervalComparator(Interval i1, Interval i2) {
-    return (int) (i1.start - i2.start);
+    return Long.compare(i1.start, i2.start);
   }
 
   /** Add one instance with its status into the pending buffer. */