diff --git a/processing/src/main/java/io/druid/granularity/PeriodGranularity.java b/processing/src/main/java/io/druid/granularity/PeriodGranularity.java
index 2aef4ff4044..c3e4feff90d 100644
--- a/processing/src/main/java/io/druid/granularity/PeriodGranularity.java
+++ b/processing/src/main/java/io/druid/granularity/PeriodGranularity.java
@@ -326,7 +326,7 @@ public class  PeriodGranularity extends BaseQueryGranularity
   @Override
   public byte[] cacheKey()
   {
-    return (period.toString() + ":" + chronology.getZone().toString()).getBytes(Charsets.UTF_8);
+    return (period.toString() + ":" + chronology.getZone().toString() + ":" + origin).getBytes(Charsets.UTF_8);
   }
 
   @Override