diff --git a/scripts/imgtool/image.py b/scripts/imgtool/image.py
index de8352a..d722efd 100644
--- a/scripts/imgtool/image.py
+++ b/scripts/imgtool/image.py
@@ -64,10 +64,9 @@
         'SHA256': 0x10,
         'SHA384': 0x11,
         'RSA2048': 0x20,
-        'ECDSA256': 0x22,
+        'ECDSASIG': 0x22,
         'RSA3072': 0x23,
         'ED25519': 0x24,
-        'ECDSASIG': 0x25,
         'ENCRSA2048': 0x30,
         'ENCKW': 0x31,
         'ENCEC256': 0x32,