diff --git a/package/boinc/0001-Adapt-code-to-fix-a-build-failure-with-openssl-4.0.patch b/package/boinc/0001-Adapt-code-to-fix-a-build-failure-with-openssl-4.0.patch
new file mode 100644
index 0000000000..22e2ef65a7
--- /dev/null
+++ b/package/boinc/0001-Adapt-code-to-fix-a-build-failure-with-openssl-4.0.patch
@@ -0,0 +1,26 @@
+From 9cdcef8261be4891b4814c6f728dcee65027e5da Mon Sep 17 00:00:00 2001
+From: Gianfranco Costamagna <locutusofborg@debian.org>
+Date: Wed, 26 Aug 2026 12:27:54 +0200
+Subject: [PATCH] Adapt code to fix a build failure with openssl-4.0
+
+Upstream: https://github.com/BOINC/boinc/commit/9cdcef8261be4891b4814c6f728dcee65027e5da
+
+[Bernd: backported to 8.2.15]
+Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
+---
+ lib/crypt.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/crypt.cpp b/lib/crypt.cpp
+index 17a9b57b3eb..b54e2f050ad 100644
+--- a/lib/crypt.cpp
++++ b/lib/crypt.cpp
+@@ -774,7 +774,7 @@
+     DATA_BLOCK sig_db;
+     BIO *bio;
+     X509 *cert;
+-    X509_NAME *subj;
++    const X509_NAME *subj;
+ 
+     if (signatures->signatures.size() == 0) {
+         printf("No signatures available for file ('%s').\n", origFile);