diff --git a/pkgs/development/r-modules/default.nix b/pkgs/development/r-modules/default.nix
index 82ebe2f15e49..7feb3e38b178 100644
--- a/pkgs/development/r-modules/default.nix
+++ b/pkgs/development/r-modules/default.nix
@@ -434,6 +434,7 @@ let
     dti = [ pkgs.which pkgs.xorg.xdpyinfo pkgs.imagemagick ];
     mzR = [ pkgs.netcdf ];
     cluster = [ pkgs.libiconv ];
+    KernSmooth = [ pkgs.libiconv ];
   };
 
   packagesRequireingX = [