diff --git a/objects/process/definition.json b/objects/process/definition.json
index a213e0d..5fdcc2b 100644
--- a/objects/process/definition.json
+++ b/objects/process/definition.json
@@ -27,7 +27,7 @@
       "ui-priority": 1,
       "misp-attribute": "text"
     },
-    "parent_pid": {
+    "parent-pid": {
       "description": "Process ID of the parent process.",
       "ui-priority": 1,
       "misp-attribute": "text"