diff --git a/src/ecdsa/keys.py b/src/ecdsa/keys.py
index a6fc13ff..c4b3f06c 100644
--- a/src/ecdsa/keys.py
+++ b/src/ecdsa/keys.py
@@ -1184,7 +1184,7 @@ def sign_deterministic(
         extra_entropy=b"",
     ):
         """
-        Create signature over data using the deterministic RFC6679 algorithm.
+        Create signature over data using the deterministic RFC6979 algorithm.
 
         The data will be hashed using the `hashfunc` function before signing.
 
@@ -1235,7 +1235,7 @@ def sign_digest_deterministic(
         allow_truncate=False,
     ):
         """
-        Create signature for digest using the deterministic RFC6679 algorithm.
+        Create signature for digest using the deterministic RFC6979 algorithm.
 
         `digest` should be the output of cryptographically secure hash function
         like SHA256 or SHA-3-256.