diff --git a/Compiler/hdf5_serial/1/variants b/Compiler/hdf5_serial/1/variants
index 0403a63..cd4bcbd 100644
--- a/Compiler/hdf5_serial/1/variants
+++ b/Compiler/hdf5_serial/1/variants
@@ -25,3 +25,4 @@ hdf5_serial/1.8.17	stable		gcc/4.8.5
 hdf5_serial/1.8.17	stable		gcc/4.9.3 
 hdf5_serial/1.8.17	stable		gcc/5.3.0 
 hdf5_serial/1.8.17	stable		gcc/6.1.0
+hdf5_serial/1.8.17	unstable	gcc/6.2.0