diff --git a/ycast/my_stations.py b/ycast/my_stations.py
index fd0bb2d..ac5dc47 100644
--- a/ycast/my_stations.py
+++ b/ycast/my_stations.py
@@ -75,7 +75,12 @@ def get_stations_by_category(category):
     return stations
 
 
-def get_checksum(feed):
+def get_checksum(feed, charlimit=12):
     hash_feed = feed.encode()
-    hash_object = hashlib.sha256(hash_feed)
-    return hash_object.hexdigest()
+    hash_object = hashlib.md5(hash_feed)
+    digest = hash_object.digest()
+    xor_fold = bytearray(digest[:8])
+    for i, b in enumerate(digest[8:]):
+        xor_fold[i] ^= b
+    digest_xor_fold = ''.join(format(x, '02x') for x in bytes(xor_fold))
+    return digest_xor_fold[:charlimit]