diff --git a/scripts/imgtool/keys/ed25519.py b/scripts/imgtool/keys/ed25519.py
index 08f67b6ed..a9959a665 100644
--- a/scripts/imgtool/keys/ed25519.py
+++ b/scripts/imgtool/keys/ed25519.py
@@ -4,7 +4,6 @@
 
 # SPDX-License-Identifier: Apache-2.0
 
-from cryptography.hazmat.backends import default_backend
 from cryptography.hazmat.primitives import serialization
 from cryptography.hazmat.primitives.asymmetric import ed25519
 
@@ -34,6 +33,11 @@ def get_public_bytes(self):
                 encoding=serialization.Encoding.DER,
                 format=serialization.PublicFormat.SubjectPublicKeyInfo)
 
+    def get_public_pem(self):
+        return self._get_public().public_bytes(
+            encoding=serialization.Encoding.PEM,
+            format=serialization.PublicFormat.SubjectPublicKeyInfo)
+
     def get_private_bytes(self, minimal, format):
         self._unsupported('get_private_bytes')