diff --git a/pkgs/development/perl-modules/CryptDES-gcc14.patch b/pkgs/development/perl-modules/CryptDES-gcc14.patch
deleted file mode 100644
index 10b161c247e2..000000000000
--- a/pkgs/development/perl-modules/CryptDES-gcc14.patch
+++ /dev/null
@@ -1,8 +0,0 @@
---- a/_des.h
-+++ b/_des.h
-@@ -4,4 +4,6 @@
- 
- void _des_crypt( des_cblock in, des_cblock out, des_ks key, int encrypt );
- void _des_expand_key( des_user_key userKey, des_ks key );
-+void perl_des_expand_key( des_user_key userKey, des_ks key );
-+void perl_des_crypt( des_cblock input, des_cblock output, des_ks ks, int encrypt );
diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 2cf8e0f3a55c..6796f495eaf1 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -5018,10 +5018,6 @@ with self; {
       url = "mirror://cpan/authors/id/D/DP/DPARIS/Crypt-DES-2.07.tar.gz";
       hash = "sha256-LbHrtYN7TLIAUcDuW3M7RFPjE33wqSMGA0yGdiHt1+c=";
     };
-    patches = [
-      # add extra definitions in header to please -Werror=implicit-function-declaration
-      ../development/perl-modules/CryptDES-gcc14.patch
-    ];
     meta = {
       description = "Perl DES encryption module";
       license = with lib.licenses; [ bsdOriginalShortened ];