diff --git a/Tools/gnuplot/files/variants b/Tools/gnuplot/files/variants
index 988e97d..be3f0f4 100644
--- a/Tools/gnuplot/files/variants
+++ b/Tools/gnuplot/files/variants
@@ -2,3 +2,4 @@ gnuplot/4.6.3	stable
 gnuplot/5.0.0	stable
 gnuplot/5.2.0	stable
 gnuplot/5.2.4	stable
+gnuplot/5.2.6	unstable