diff --git a/Lib/encodings/aliases.py b/Lib/encodings/aliases.py
index c6f5aeb..992eef4 100644
--- a/Lib/encodings/aliases.py
+++ b/Lib/encodings/aliases.py
@@ -442,7 +442,7 @@
     'csptcp154'          : 'ptcp154',
     'pt154'              : 'ptcp154',
     'cp154'              : 'ptcp154',
-    'cyrillic-asian'     : 'ptcp154',
+    'cyrillic_asian'     : 'ptcp154',
 
     # quopri_codec codec
     'quopri'             : 'quopri_codec',
diff --git a/Misc/NEWS b/Misc/NEWS
index 041f2a7..d366818 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,8 @@
 Core and Builtins
 -----------------
 
+- Issue #1757126: Fix the cyrillic-asian alias for the ptcp154 encoding.
+
 - Fix several issues with compile().  The input can now contain Windows and Mac
   newlines and is no longer required to end in a newline.