diff --git a/hoodie-utilities/src/main/java/com/uber/hoodie/utilities/keygen/TimestampBasedKeyGenerator.java b/hoodie-utilities/src/main/java/com/uber/hoodie/utilities/keygen/TimestampBasedKeyGenerator.java
index 34be8d142..2b7e7ade5 100644
--- a/hoodie-utilities/src/main/java/com/uber/hoodie/utilities/keygen/TimestampBasedKeyGenerator.java
+++ b/hoodie-utilities/src/main/java/com/uber/hoodie/utilities/keygen/TimestampBasedKeyGenerator.java
@@ -91,7 +91,7 @@ public class TimestampBasedKeyGenerator extends SimpleKeyGenerator {
             } else if (partitionVal instanceof Long) {
                 unixTime = (Long) partitionVal;
             } else if (partitionVal instanceof String) {
-                unixTime = inputDateFormat.parse(partitionVal.toString()).getTime();
+                unixTime = inputDateFormat.parse(partitionVal.toString()).getTime() / 1000;
             } else {
                 throw new HoodieNotSupportedException("Unexpected type for partition field: "+ partitionVal.getClass().getName());
             }