diff --git a/roles/mongodb/tasks/install.yml b/roles/mongodb/tasks/install.yml
index 5092a5d38..2d551d48a 100644
--- a/roles/mongodb/tasks/install.yml
+++ b/roles/mongodb/tasks/install.yml
@@ -59,7 +59,7 @@
 
 
   # end block
-  when: not (ansible_architecture == "amd64") or not (ansible_architecture == "aarch64")
+  when: not (ansible_architecture == "amd64" or ansible_architecture == "aarch64")
 
 # OLD WAY / MUCH SLOWER: had put unnec duplicate copies in /opt/iiab/downloads/mongodb-3.0.1x
 #