diff --git a/ArgusCore/src/main/java/com/salesforce/dva/argus/service/alert/notifier/DefaultNotifier.java b/ArgusCore/src/main/java/com/salesforce/dva/argus/service/alert/notifier/DefaultNotifier.java
index e5b1ba0e1..8a83f8e48 100644
--- a/ArgusCore/src/main/java/com/salesforce/dva/argus/service/alert/notifier/DefaultNotifier.java
+++ b/ArgusCore/src/main/java/com/salesforce/dva/argus/service/alert/notifier/DefaultNotifier.java
@@ -113,8 +113,8 @@ public String getExpressionWithAbsoluteStartAndEndTimeStamps(NotificationContext
         try {
             String expression = "@" + context.getAlert().getExpression().replaceAll("[\\s\\t\\r\\n\\f]*", "");
             String regexMatcherWithStartAndEnd = "(?i)\\-[0-9]+(d|m|h|s):\\-[0-9]+(d|m|h|s)";
-            String regexMatcherWithStartAndEndFill = "(?i)FILL\\(#\\-[0-9]+(d|h|m|s)#,#\\-[0-9]+(d|h|m|s)#";
-            String regexMatcherWithoutEnd = "(?i)\\@\\-[0-9]+(d|m|h|s)|\\(\\-[0-9]+(d|m|h|s)|:\\-[0-9]+(d|m|h|s)|,\\-[0-9]+(d|m|h|s)";
+            String regexMatcherWithConstants = "(?i)#\\-[0-9]+(d|h|m|s)";
+            String regexMatcherWithoutEnd = "(?i)\\@\\-[0-9]+(d|m|h|s)|\\(\\-[0-9]+(d|m|h|s)|,\\-[0-9]+(d|m|h|s)";
             Long relativeTo = context.getAlertEnqueueTimestamp();
 
             Matcher m = Pattern.compile(regexMatcherWithStartAndEnd).matcher(expression);
@@ -125,12 +125,11 @@ public String getExpressionWithAbsoluteStartAndEndTimeStamps(NotificationContext
                 }
             }
 
-            m = Pattern.compile(regexMatcherWithStartAndEndFill).matcher(expression);
+            m = Pattern.compile(regexMatcherWithConstants).matcher(expression);
             while (m.find()) {
-                for (String timeStr: m.group().substring(6,m.group().length()-1).split("#,#")) {
-                    Long absoluteTime = MetricReader.getTime(relativeTo, timeStr);
-                    expression = expression.replaceFirst(timeStr, ""  + absoluteTime);
-                }
+                String timeStr = m.group();
+                Long absoluteTime = MetricReader.getTime(relativeTo, timeStr.substring(1));
+                expression = expression.replaceFirst(timeStr, ("" + timeStr.charAt(0)) + absoluteTime);
             }
 
             m = Pattern.compile(regexMatcherWithoutEnd).matcher(expression);
diff --git a/ArgusCore/src/test/java/com/salesforce/dva/argus/service/NotifierTest.java b/ArgusCore/src/test/java/com/salesforce/dva/argus/service/NotifierTest.java
index 5b2c55104..cbd3de6fd 100644
--- a/ArgusCore/src/test/java/com/salesforce/dva/argus/service/NotifierTest.java
+++ b/ArgusCore/src/test/java/com/salesforce/dva/argus/service/NotifierTest.java
@@ -163,7 +163,7 @@ public void testAbsoluteTimeStampsInExpression() {
                 "RANGE(1417455600000:1418319600000:scope:metric[ABCD]:avg:1d-max)",
                 "DOWNSAMPLE(DOWNSAMPLE(GROUPBYTAG(CULL_BELOW(1418312700000:1418318700000:iot-provisioning-server.PRD.SP2.-:health.status{device=provisioning-warden-*}:avg:1m-max,#1#,#value#),#DeploymentName#,#MAX#),#1m-max#),#10m-count#)",
                 "DOWNSAMPLE(CULL_BELOW(DERIVATIVE(1418312700000:1418318700000:iot-container.PRD.NONE.-:iot.flows.state.load.errors_count{flowsnakeEnvironmentName=iot-prd-stmfa-00ds70000000mqy}:zimsum:1m-sum),#0#,#value#),#10m-sum#)",
-                "DOWNSAMPLE(1418146800000:1418319600000:alerts.scheduled:alert-1429851:zimsum,#5m-sum#,#-2d#,#-0m#,#0#)"
+                "DOWNSAMPLE(1418146800000:1418319600000:alerts.scheduled:alert-1429851:zimsum,#5m-sum#,#1418146800000#,#1418319600000#,#0#)"
                 ));
 
         UserService userService = system.getServiceFactory().getUserService();