diff --git a/scripts/imgtool/main.py b/scripts/imgtool/main.py
index 8fee864..e01a26c 100755
--- a/scripts/imgtool/main.py
+++ b/scripts/imgtool/main.py
@@ -245,7 +245,7 @@
                    'was set.')
 @click.option('-E', '--encrypt', metavar='filename',
               help='Encrypt image using the provided public key. '
-                   '(Not supported in direct-xip mode.)')
+                   '(Not supported in direct-xip or ram-load mode.)')
 @click.option('-e', '--endian', type=click.Choice(['little', 'big']),
               default='little', help="Select little or big endian")
 @click.option('--overwrite-only', default=False, is_flag=True,