diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 10a30c672c2c..12ead6da77ef 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -18875,6 +18875,15 @@ with self; {
       url = "mirror://cpan/authors/id/C/CF/CFAERBER/Net-IDN-Encode-2.500.tar.gz";
       hash = "sha256-VUU2M+P/JM4yWzS8LIFXuYWZYqMatc8ov3zMHJs6Pqo=";
     };
+    patches = [
+      # Fix use of function removed in Perl 5.38.0
+      # https://github.com/cfaerber/Net-IDN-Encode/pull/11
+      (fetchpatch2 {
+        name = "Net-IDN-Encode-use-uvchr_to_utf8_flags.patch";
+        url = "https://github.com/cfaerber/Net-IDN-Encode/commit/3ebe6f2e239b470efcb64a044edc8202798188af.diff";
+        hash = "sha256-t/BulZoyRvpi+TKNxKFxUS1y3X7bGi1sG7mG75nW/Gc=";
+      })
+    ];
     buildInputs = [ TestNoWarnings ];
     perlPreHook = "export LD=$CC";
     meta = {