diff --git a/lib/Slic3r/GUI.pm b/lib/Slic3r/GUI.pm
index b590a5de96..03f1ab1050 100644
--- a/lib/Slic3r/GUI.pm
+++ b/lib/Slic3r/GUI.pm
@@ -14,7 +14,7 @@ use Slic3r::GUI::SkeinPanel;
 use Slic3r::GUI::SimpleTab;
 use Slic3r::GUI::Tab;
 
-our $have_OpenGL = 0 && eval "use Slic3r::GUI::PreviewCanvas; 1";
+our $have_OpenGL = eval "use Slic3r::GUI::PreviewCanvas; 1";
 
 use Wx 0.9901 qw(:bitmap :dialog :frame :icon :id :misc :systemsettings :toplevelwindow);
 use Wx::Event qw(EVT_CLOSE EVT_MENU);