diff --git a/pkgs/development/r-modules/default.nix b/pkgs/development/r-modules/default.nix
index e9f7fd443a7b..04b974f2b47b 100644
--- a/pkgs/development/r-modules/default.nix
+++ b/pkgs/development/r-modules/default.nix
@@ -1174,6 +1174,7 @@ let
     showtext = [ pkgs.pkg-config ];
     spate = [ pkgs.pkg-config ];
     stringi = [ pkgs.pkg-config ];
+    SynExtend = [ pkgs.zlib.dev ];
     sysfonts = [ pkgs.pkg-config ];
     systemfonts = [ pkgs.pkg-config ];
     tesseract = [ pkgs.pkg-config ];