diff --git a/gns3server/compute/dynamips/__init__.py b/gns3server/compute/dynamips/__init__.py
index c7b35147..a996d5f5 100644
--- a/gns3server/compute/dynamips/__init__.py
+++ b/gns3server/compute/dynamips/__init__.py
@@ -493,7 +493,7 @@ class Dynamips(BaseManager):
             await vm.set_sparsemem(False)
 
         usage = settings.get("usage")
-        if usage and usage != vm.usage:
+        if usage is not None and usage != vm.usage:
             vm.usage = usage
 
         # update the configs if needed