diff -r 5aff241c29e5 -r 9c9277601d98 libpurple/protocols/oscar/family_auth.c
--- a/libpurple/protocols/oscar/family_auth.c	Fri Jun 02 15:17:12 2017 -0500
+++ b/libpurple/protocols/oscar/family_auth.c	Fri Jun 02 15:19:48 2017 -0500
@@ -99,7 +99,7 @@
 	g_checksum_reset(hash);
 
 	g_checksum_update(hash, (const guchar *)key, -1);
-	g_checksum_update(hash, passdigest, 16);
+	g_checksum_update(hash, passdigest, digest_len);
 	g_checksum_update(hash, (const guchar *)AIM_MD5_STRING, -1);
 	g_checksum_get_digest(hash, digest, &digest_len);
 	g_checksum_free(hash);