diff --git a/docs.it4i/software/viz/qtiplot.md b/docs.it4i/software/viz/qtiplot.md
index f4a9b52f99164a9f05b8fcd71300515a0d476dd9..ca5d68c3758aad92601baab78c616d5d62c7fd0d 100644
--- a/docs.it4i/software/viz/qtiplot.md
+++ b/docs.it4i/software/viz/qtiplot.md
@@ -20,7 +20,7 @@ $ ml av QtiPlot
 ## Running QtiPlot
 
 !!! important
-    You must first enable [VNC][a] or [X Window System][b] GUI environment.
+    You must first enable the [VNC][a] or [X Window System][b] GUI environment.
 
 To run QtiPlot, use: