diff --git a/pkgs/development/r-modules/default.nix b/pkgs/development/r-modules/default.nix
index 35822fa78bd..25019f0d8a5 100644
--- a/pkgs/development/r-modules/default.nix
+++ b/pkgs/development/r-modules/default.nix
@@ -397,6 +397,7 @@ let
     RPushbullet = [ pkgs.which ];
     qtpaint = [ pkgs.cmake ];
     qtbase = [ pkgs.cmake pkgs.perl ];
+    RcppEigen = [ pkgs.libiconv ];
     RCurl = [ pkgs.curl.dev ];
     R2SWF = [ pkgs.pkgconfig ];
     rggobi = [ pkgs.pkgconfig ];