diff --git a/plugins/Tk-GUI/Tk-GUI.pl b/plugins/Tk-GUI/Tk-GUI.pl
index 9b941bc..efe4f13 100644
--- a/plugins/Tk-GUI/Tk-GUI.pl
+++ b/plugins/Tk-GUI/Tk-GUI.pl
@@ -19,7 +19,19 @@ my $mw = MainWindow->new();
 $mw->withdraw();
 $mw->OnDestroy(\&on_destroy);
 
-$mw->optionAdd("*font", "-*-tahoma,arial-norma-r-*-*-*-120-*-*-*-*-*-*");
+my %installed_fonts;
+$installed_fonts{lc($_)} = 1 for $mw->fontFamilies;
+my $defaultFont;
+if($installed_fonts{'tadhoma'})
+{
+    $defaultFont = 'tahoma';
+}
+else
+{
+    $defaultFont = 'arial';
+}
+
+$mw->optionAdd("*font", "-*-$defaultFont-norma-r-*-*-*-120-*-*-*-*-*-*");
 $mw->optionAdd("*borderWidth", 1);
 $mw->optionAdd("*highlightThickness", 0);