diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/timestamp/TimestampConfig.java b/runelite-client/src/main/java/net/runelite/client/plugins/timestamp/TimestampConfig.java
index fda97b0941..b2229c9280 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/timestamp/TimestampConfig.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/timestamp/TimestampConfig.java
@@ -59,7 +59,8 @@ public interface TimestampConfig extends Config
 			"'HH' : hour in 24 hour format<br>" +
 			"'hh' : hour in 12 hour format<br>" +
 			"'mm' : minute<br>" +
-			"'ss' : second"
+			"'ss' : second<br>" +
+			"'a'  : AM/PM"
 	)
 	default String timestampFormat()
 	{