diff --git a/cmds/am/src/com/android/commands/am/Am.java b/cmds/am/src/com/android/commands/am/Am.java
index c18f54259678e..0344d261fd35f 100644
--- a/cmds/am/src/com/android/commands/am/Am.java
+++ b/cmds/am/src/com/android/commands/am/Am.java
@@ -107,7 +107,7 @@ public class Am extends BaseCommand {
                 "       am switch-user <USER_ID>\n" +
                 "       am stop-user <USER_ID>\n" +
                 "       am stack create <TASK_ID> <RELATIVE_STACK_BOX_ID> <POSITION> <WEIGHT>\n" +
-                "       am stack movetask <STACK_ID> <TASK_ID> [true|false]\n" +
+                "       am stack movetask <TASK_ID> <STACK_ID> [true|false]\n" +
                 "       am stack resize <STACK_ID> <WEIGHT>\n" +
                 "       am stack boxes\n" +
                 "       am stack box <STACK_BOX_ID>\n" +