diff --git a/etc/sysconfig/profile.d/qtlib b/etc/sysconfig/profile.d/qtlib
index 8d9e028..853c10a 100644
--- a/etc/sysconfig/profile.d/qtlib
+++ b/etc/sysconfig/profile.d/qtlib
@@ -26,5 +26,10 @@
 QTDIR=/opt/qt-4
 MANPATH=$MANPATH:/opt/qt-4/doc/man
 PATH=$PATH:/opt/qt-4/bin
+if [ -d /opt/qt-4/lib64 ]; then
+	QMAKESPEC=linux-g++-64
+else
+	QMAKESPEC=linux-g++
+fi
 PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/opt/qt-4/lib/pkgconfig
 export QTDIR MANPATH PATH PKG_CONFIG_PATH