diff --git a/ci/fvp.yml b/ci/fvp.yml
index a12c621e..a8f8dfc0 100644
--- a/ci/fvp.yml
+++ b/ci/fvp.yml
@@ -3,7 +3,7 @@ header:
 
 local_conf_header:
   testimagefvp: |
-    INHERIT = "fvpboot"
+    INHERIT += "fvpboot"
     # This fails but we can't add to the ignorelist from meta-arm yet
     # https://bugzilla.yoctoproject.org/show_bug.cgi?id=14604
     TEST_SUITES:remove = "parselogs"