diff --git a/pkgs/development/r-modules/default.nix b/pkgs/development/r-modules/default.nix
index e8767debb668..383e917c8fa7 100644
--- a/pkgs/development/r-modules/default.nix
+++ b/pkgs/development/r-modules/default.nix
@@ -1787,6 +1787,15 @@ let
       '';
     });
 
+    cn_farms = old.cn_farms.overrideAttrs (attrs: {
+      postPatch = ''
+        # https://developer.r-project.org/blosxom.cgi/R-devel/NEWS/2025/01/08#n2025-01-08
+        substituteInPlace "src/sparse_farms.c" \
+        --replace-fail "Calloc" "R_Calloc" \
+        --replace-fail "Free" "R_Free"
+      '';
+    });
+
     PICS = old.PICS.overrideAttrs (attrs: {
       postPatch = ''
         # https://developer.r-project.org/blosxom.cgi/R-devel/NEWS/2025/01/08#n2025-01-08