diff --git a/src/main/java/seedu/address/logic/commands/AddAppointmentCommand.java b/src/main/java/seedu/address/logic/commands/AddAppointmentCommand.java
index 68bcdf6e706..75152a05d73 100644
--- a/src/main/java/seedu/address/logic/commands/AddAppointmentCommand.java
+++ b/src/main/java/seedu/address/logic/commands/AddAppointmentCommand.java
@@ -18,7 +18,7 @@ public class AddAppointmentCommand extends Command {
     public static final String MESSAGE_USAGE =
         "appt"
         + COMMAND_WORD + ": Adds an appointment to the appointment book. " + "Parameters: " + PREFIX_NAME + "ID "
-            + PREFIX_DATETIME + "DATETIME \n" + "Example: appt " + COMMAND_WORD + " " + PREFIX_NAME + "1"
+            + PREFIX_DATETIME + "DATETIME \n" + "Example: appt " + COMMAND_WORD + " " + PREFIX_NAME + "1 "
             + PREFIX_DATETIME + "2021-12-31 1600";
 
     public static final String MESSAGE_SUCCESS = "New appointment added: %1$s";