diff --git a/gimmecert/crypto.py b/gimmecert/crypto.py
index 6fab559d2299cd4c928a635e92130c093a3a8576..88862dfb76678da44f42f488fd42904ad2308830 100644
--- a/gimmecert/crypto.py
+++ b/gimmecert/crypto.py
@@ -460,12 +460,14 @@ def key_specification_from_public_key(public_key):
     :type public_key: cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey
 
     :returns: Key algorithm and parameter(s) for generating same type of keys as the passed-in public key.
-    :rtype: tuple(str, int)
+    :rtype: tuple(str, int or cryptography.hazmat.primitives.asymmetric.ec.EllipticCurve)
 
     :raises ValueError: If algorithm/parameters could not be derived from the passed-in public key.
     """
 
     if isinstance(public_key, cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey):
         return "rsa", public_key.key_size
+    elif isinstance(public_key, cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey):
+        return "ecdsa", type(public_key.curve)
 
     raise ValueError("Unsupported public key instance passed-in: \"%s\" (%s)" % (str(public_key), type(public_key)))