diff --git a/pkgs/applications/gis/qgis/default.nix b/pkgs/applications/gis/qgis/default.nix
index d0b7eb9e892..896387b1f7f 100644
--- a/pkgs/applications/gis/qgis/default.nix
+++ b/pkgs/applications/gis/qgis/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, fetchpatch, gdal, cmake, qt4, flex, bison, proj, geos, xlibsWrapper, sqlite, gsl
 , qwt, fcgi, python2Packages, libspatialindex, libspatialite, qscintilla, postgresql, makeWrapper
 , qjson, qca2, txt2tags, openssl, darwin, pkgconfig
-, withGrass ? false, grass, IOKit, ApplicationServices
+, withGrass ? true, grass, IOKit, ApplicationServices
 }:
 
 stdenv.mkDerivation rec {