diff --git a/devel/R-cran-pak/files/patch-src_library_curl_src_curl.c b/devel/R-cran-pak/files/patch-src_library_curl_src_curl.c
new file mode 100644
index 000000000000..e0c8a6bc9e7c
--- /dev/null
+++ b/devel/R-cran-pak/files/patch-src_library_curl_src_curl.c
@@ -0,0 +1,12 @@
+--- src/library/curl/src/curl.c.orig	2026-01-09 10:51:35 UTC
++++ src/library/curl/src/curl.c
+@@ -33,6 +33,9 @@
+ #define BSWAP_32(x) bswap_32(x)
+ #elif (defined(_AIX))
+ #define BSWAP_32(x) __builtin_bswap32(x)
++#elif (defined(__FreeBSD__))
++#include <sys/endian.h>
++#define BSWAP_32(x) bswap32(x)
+ #endif
+ #endif
+