diff --git a/lib/Slic3r/GUI/MainFrame.pm b/lib/Slic3r/GUI/MainFrame.pm
index a8190b934a..62ea301217 100644
--- a/lib/Slic3r/GUI/MainFrame.pm
+++ b/lib/Slic3r/GUI/MainFrame.pm
@@ -41,7 +41,8 @@ sub new {
     
     # set default tooltip timer in msec
     # SetAutoPop supposedly accepts long integers but some bug doesn't allow for larger values
-    Wx::ToolTip::SetAutoPop(32767);
+    # (SetAutoPop is not available on GTK.)
+    eval { Wx::ToolTip::SetAutoPop(32767) };
     
     # initialize status bar
     $self->{statusbar} = Slic3r::GUI::ProgressStatusBar->new($self, -1);