1 files changed, 1 insertions, 1 deletions
diff --git a/eigen.pri b/eigen.pri
index efb2d3c..0ee551c 100644
--- a/eigen.pri
+++ b/eigen.pri
@@ -51,7 +51,7 @@ isEmpty(EIGEN_INCLUDEPATH) {
   netbsd*: EIGEN_INCLUDEPATH = /usr/pkg/include/eigen3
   linux*|hurd*|unix: EIGEN_INCLUDEPATH = /usr/include/eigen3
   macx: EIGEN_INCLUDEPATH = /opt/local/include/eigen3
-  !exists(EIGEN_INCLUDEPATH) {
+  !exists($$EIGEN_INCLUDEPATH) {
     freebsd-g++: EIGEN_INCLUDEPATH = /usr/local/include/eigen2
     netbsd*: EIGEN_INCLUDEPATH = /usr/pkg/include/eigen2
     linux*|hurd*|unix*: EIGEN_INCLUDEPATH = /usr/include/eigen2