diff --git a/GCV-3.6.1-T4/src/GCV.pro b/GCV-3.6.1-T4/src/GCV.pro
index 905cc7e..cd7341b 100644
--- a/GCV-3.6.1-T4/src/GCV.pro
+++ b/GCV-3.6.1-T4/src/GCV.pro
@@ -44,7 +44,14 @@ else {
 # QGlViewer
 QT += xml opengl
 INCLUDEPATH += QGLViewer QGLWidget
-LIBS += -lQGlViewer2
+unix {
+    LIBS += -lQGLViewer
+} else {
+    LIBS += -lQGlViewer2
+}
+unix:!macx {
+    LIBS += -lGLU
+}
 HEADER +=  visu3D/Point3D.h visu3D/Line3D.h visu3D/Arc3D.h visu3D/Tools3D.h  visu3D/Box3D.h
 SOURCES += visu3D/Point3D.cpp visu3D/Line3D.cpp visu3D/Arc3D.cpp visu3D/Tools3D.cpp visu3D/Box3D.cpp
 
diff --git a/GCV-3.6.1-T4/src/visu3D/viewer3D.cpp b/GCV-3.6.1-T4/src/visu3D/viewer3D.cpp
index bd3fa27..8afcb39 100644
--- a/GCV-3.6.1-T4/src/visu3D/viewer3D.cpp
+++ b/GCV-3.6.1-T4/src/visu3D/viewer3D.cpp
@@ -9,9 +9,9 @@
 
 #include "viewer3D.h"
 #include <math.h>
-#include "point3D.h"
-#include "line3D.h"
-#include "arc3d.h"
+#include "Point3D.h"
+#include "Line3D.h"
+#include "Arc3D.h"
 #include "box3D.h"
 #include "version.h"