diff --git a/pkgs/by-name/cy/cyrus_sasl/package.nix b/pkgs/by-name/cy/cyrus_sasl/package.nix
index 967206a14f89..27ef2cc7ac2d 100644
--- a/pkgs/by-name/cy/cyrus_sasl/package.nix
+++ b/pkgs/by-name/cy/cyrus_sasl/package.nix
@@ -39,6 +39,11 @@ stdenv.mkDerivation rec {
       url = "https://github.com/cyrusimap/cyrus-sasl/compare/cb549ef71c5bb646fe583697ebdcaba93267a237...dfaa62392e7caecc6ecf0097b4d73738ec4fc0a8.patch";
       hash = "sha256-pc0cZqj1QoxDqgd/j/5q3vWONEPrTm4Pr6MzHlfjRCc=";
     })
+    # Fix build with gcc15
+    (fetchpatch {
+      url = "https://src.fedoraproject.org/rpms/cyrus-sasl/raw/388b80c6a8f93667587b4ac2e7992d0aa1c431f9/f/cyrus-sasl-2.1.28-gcc15.patch";
+      hash = "sha256-AfSQXFtVh0IHG8Uw9nWMWlkQnyaX3ZMsdZLd7hTru7Q=";
+    })
   ];
 
   outputs = [