diff --git a/plugins/modules/activation.py b/plugins/modules/activation.py
index 7cc11ce7..5fb71b4d 100644
--- a/plugins/modules/activation.py
+++ b/plugins/modules/activation.py
@@ -175,7 +175,7 @@ def create_params(module, controller):
     # Get the rulebook id
     rulebook = None
     params = {}
-    if project_id:
+    if project_id is not None:
         params = {"data": {"project_id": project_id}}
     if module.params.get("rulebook_name"):
         try: