diff --git a/objects/malware/definition.json b/objects/malware/definition.json
index 89162d0..69e3f73 100644
--- a/objects/malware/definition.json
+++ b/objects/malware/definition.json
@@ -112,7 +112,7 @@
     "is_family": {
       "description": "Defines whether the object represents a malware family or a malware instance.",
       "disable_correlation": true,
-      "misp-attribute": "bool",
+      "misp-attribute": "boolean",
       "ui-priority": 1
     },
     "last_seen": {