diff --git a/mpcdf_common.py b/mpcdf_common.py
index 8323a0dd8d30032f9943b18141123ed0b3ecbed4..5fc127dbe7d595a0f83eb3bd2df1a20000a1219a 100644
--- a/mpcdf_common.py
+++ b/mpcdf_common.py
@@ -37,6 +37,8 @@ def valid_cuda(cuda, compiler):
     """
     if cuda == "cuda_8":
         return compiler == "gcc_5"
+    if cuda == "cuda_9":
+        return compiler == "gcc_6"
     return False