diff --git a/qgis.spec b/qgis.spec
index 912886f..894797a 100644
--- a/qgis.spec
+++ b/qgis.spec
@@ -11,12 +11,12 @@ Url:            http://www.qgis.org/
 Summary:        Quantum GIS (QGIS) is designed to be a Geographic Information System (GIS) built for Linux/Unix.
 Packager:       Dirk Stöcker <opensuse@dstoecker.de>
 Requires:       libgeos >= 2
-Requires:       grass >= 6.2.1
 Requires:       libgdal >= 1.4.1
 Requires:       sqlite >= 3
 Requires:       libqt4 >= 4.2
 Requires:       gsl >= 1.6
 Requires:       postgresql >= 8 postgresql-libs >= 8
+BuildRequires:  python-devel
 BuildRequires:  libgdal-devel >= 1.4.1
 BuildRequires:  libgeos-devel >= 2
 BuildRequires:  libproj-devel
@@ -38,7 +38,8 @@ Requires:       qgis = %{version}
 %package plugin-grass
 Summary:        GRASS Support Libraries for Quantum GIS
 Group:          Libraries
-Requires:       qgis = %{version}, grass
+Requires:       qgis = %{version}
+Requires:       grass >= 6.2.1
 
 %description
 Quantum GIS (QGIS) is a user friendly Open Source Geographic Information 
@@ -90,8 +91,14 @@ export CFLAGS="$RPM_OPT_FLAGS"
 export QTDIR=/usr
 export PATH=$PATH:$QTDIR/bin
 
+%ifarch x86_64
+%define libsuffix -DLIB_SUFFIX=64
+%else
+%define libsuffix ""
+%endif
+
 cmake -D CMAKE_INSTALL_PREFIX=%{_prefix} \
-      -D GRASS_PREFIX=/opt/grass \
+      -D GRASS_PREFIX=/opt/grass %{libsuffix}\
       .
 
 #echo "for 'make' run first:"