diff --git a/Compiler/gsl/files/variants.rhel6 b/Compiler/gsl/files/variants.rhel6
index 236f69e369986700e5c1b708ecd30a53ed86ab0e..fe4bd882448f92b199fdb7867133c5c687e801da 100644
--- a/Compiler/gsl/files/variants.rhel6
+++ b/Compiler/gsl/files/variants.rhel6
@@ -14,3 +14,4 @@ gsl/2.5		stable		intel/19.4
 
 gsl/2.6		stable		gcc/{7.4.0,8.3.0,9.1.0,9.2.0}
 gsl/2.6		stable		gcc/{7.5.0,8.4.0,9.3.0,10.1.0}
+gsl/2.6		unstable	gcc/10.2.0