diff --git a/scripts/imgtool/image.py b/scripts/imgtool/image.py
index 803aff69e0..04036b2137 100755
--- a/scripts/imgtool/image.py
+++ b/scripts/imgtool/image.py
@@ -194,6 +194,7 @@ def tlv_sha_to_sha(tlv):
     keys.RSAPublic          : ['256'],
     # This two are set to 256 for compatibility, the right would be 512
     keys.Ed25519            : ['256', '512'],
+    keys.Ed25519Public      : ['256', '512'],
     keys.X25519             : ['256', '512']
 }