diff --git a/Compiler/openmpi/files/variants.rhel6 b/Compiler/openmpi/files/variants.rhel6
index 0f78053..8424455 100644
--- a/Compiler/openmpi/files/variants.rhel6
+++ b/Compiler/openmpi/files/variants.rhel6
@@ -43,3 +43,5 @@ openmpi/3.1.6	stable		gcc/{7.5.0,8.4.0,9.3.0,10.1.0}
 openmpi/4.0.0	stable		gcc/{5.5,6.4,6.5,7.3,7.4,8.2,8.3}.0
 
 openmpi/4.0.1   stable		gcc/7.4.0
+
+openmpi/4.0.5   unstable	gcc/{7.5.0,8.4.0,9.3.0,10.2.0} ucx/1.8.1