diff --git a/pkgs/development/r-modules/default.nix b/pkgs/development/r-modules/default.nix
index 1616eacffc6..35eddb6caca 100644
--- a/pkgs/development/r-modules/default.nix
+++ b/pkgs/development/r-modules/default.nix
@@ -448,6 +448,7 @@ let
     phangorn = [ pkgs.libiconv ];
     quadprog = [ pkgs.libiconv ];
     sundialr = [ pkgs.libiconv ];
+    ucminf = [ pkgs.libiconv ];
   };
 
   packagesRequireingX = [