diff --git a/pkgs/misc/cups/pdf-filter.nix b/pkgs/misc/cups/pdf-filter.nix
index d3a20b9c025f..8a08eadc6a48 100644
--- a/pkgs/misc/cups/pdf-filter.nix
+++ b/pkgs/misc/cups/pdf-filter.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation {
 
   preConfigure = ''
     sed -e 's@\.\./cups/$(LIBCUPS)@@' -e 's@$(LIBCUPSIMAGE)@@' -i filter/Makefile
-    ''; 
+    '';
 
   NIX_LDFLAGS="-L${cups}/lib";