diff --git a/gnu/packages/crates-crypto.scm b/gnu/packages/crates-crypto.scm
index 6505934e89..c7a3302823 100644
--- a/gnu/packages/crates-crypto.scm
+++ b/gnu/packages/crates-crypto.scm
@@ -1552,24 +1552,6 @@ (define-public rust-crypto-mac-0.7
         ("rust-generic-array" ,rust-generic-array-0.12)
         ("rust-subtle" ,rust-subtle-1))))))
 
-(define-public rust-crypto-mac-0.5
-  (package
-    (inherit rust-crypto-mac-0.10)
-    (name "rust-crypto-mac")
-    (version "0.5.2")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "crypto-mac" version))
-       (file-name (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32 "0n6r10zlnfv9gbjj0380sxfffxhq1khfjqwsn7fx8iil9pzv9689"))))
-    (arguments
-     `(#:skip-build? #t
-       #:cargo-inputs
-       (("rust-constant-time-eq" ,rust-constant-time-eq-0.1)
-        ("rust-generic-array" ,rust-generic-array-0.9))))))
-
 (define-public rust-crypto-mac-0.4
   (package
     (name "rust-crypto-mac")