diff --git a/modules/preprocessing.py b/modules/preprocessing.py
index 01054bfa226618ef4644c1887ed9882e8f2a324f..b28f3ac08e2c681785cf0b923802e9b499d077b3 100644
--- a/modules/preprocessing.py
+++ b/modules/preprocessing.py
@@ -45,7 +45,7 @@ def _add_flavors(definitions):
             if "memory" not in host:
                 host["memory"] = FLAVORS[host["flavor"]]["memory"]
             if "cpus" not in host:
-                host["memory"] = FLAVORS[host["flavor"]]["cores"]
+                host["cpus"] = FLAVORS[host["flavor"]]["cores"]
             host.pop("flavor")