diff --git a/jsmpp/src/main/java/org/jsmpp/util/AbsoluteTimeFormatter.java b/jsmpp/src/main/java/org/jsmpp/util/AbsoluteTimeFormatter.java
index <HASH>..<HASH> 100644
--- a/jsmpp/src/main/java/org/jsmpp/util/AbsoluteTimeFormatter.java
+++ b/jsmpp/src/main/java/org/jsmpp/util/AbsoluteTimeFormatter.java
@@ -50,7 +50,7 @@ public class AbsoluteTimeFormatter implements TimeFormatter {
         
         // Get the sign
         char sign;
-        if (offset > 0) {
+        if (offset >= 0) {
             sign = '+';
         } else {
             sign = '-';
When offset is 0, use '+' sign.