diff --git a/CHANGELOG.md b/CHANGELOG.md
index b7c00ea686..ed5dccdd8b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## v2.7.1 Bamboozled Buffalo
+* Add library function specifications for fortified `inet_pton` and `inet_ntop` (#1883).
+
 ## v2.7.0 Bamboozled Buffalo
 Functionally equivalent to Goblint in SV-COMP 2026.
 
diff --git a/src/util/library/libraryFunctions.ml b/src/util/library/libraryFunctions.ml
index 8f7c175ffe..ee663d4152 100644
--- a/src/util/library/libraryFunctions.ml
+++ b/src/util/library/libraryFunctions.ml
@@ -354,7 +354,13 @@ let posix_descs_list: (string * LibraryDesc.t) list = LibraryDsl.[
     ("pclose", unknown [drop "stream" [w; f]]);
     ("getcwd", unknown [drop "buf" [w]; drop "size" []]);
     ("inet_pton", unknown [drop "af" []; drop "src" [r]; drop "dst" [w]]);
+    ("__inet_pton_alias", unknown [drop "af" []; drop "src" [r]; drop "dst" [w]]);
+    ("__inet_pton_chk", unknown [drop "af" []; drop "src" [r]; drop "dst" [w]; drop "os" []]);
+    ("__inet_pton_chk_warn", unknown [drop "af" []; drop "src" [r]; drop "dst" [w]; drop "os" []]);
     ("inet_ntop", unknown [drop "af" []; drop "src" [r]; drop "dst" [w]; drop "size" []]);
+    ("__inet_ntop_alias", unknown [drop "af" []; drop "src" [r]; drop "dst" [w]; drop "size" []]);
+    ("__inet_ntop_chk", unknown [drop "af" []; drop "src" [r]; drop "dst" [w]; drop "size" []; drop "os" []]);
+    ("__inet_ntop_chk_warn", unknown [drop "af" []; drop "src" [r]; drop "dst" [w]; drop "size" []; drop "os" []]);
     ("gethostent", unknown ~attrs:[ThreadUnsafe] []);
     ("poll", unknown [drop "fds" [r]; drop "nfds" []; drop "timeout" []]);
     ("semget", unknown [drop "key" []; drop "nsems" []; drop "semflg" []]);