diff --git a/src/main/java/com/hubspot/jinjava/lib/fn/Functions.java b/src/main/java/com/hubspot/jinjava/lib/fn/Functions.java
index 44580839a..6c0b9600c 100644
--- a/src/main/java/com/hubspot/jinjava/lib/fn/Functions.java
+++ b/src/main/java/com/hubspot/jinjava/lib/fn/Functions.java
@@ -252,7 +252,7 @@ public static long unixtimestamp(Object... var) {
       return 0;
     }
 
-    return d.toEpochSecond() * 1000 + Math.round(d.getNano() / 1_000_000.0);
+    return d.toEpochSecond() * 1000 + d.getNano() / 1_000_000;
   }
 
   @JinjavaDoc(