diff --git a/src/core/config/Categories.json b/src/core/config/Categories.json
index 4f1b3328..d68c1713 100644
--- a/src/core/config/Categories.json
+++ b/src/core/config/Categories.json
@@ -312,6 +312,7 @@
             "To UNIX Timestamp",
             "Windows Filetime to UNIX Timestamp",
             "UNIX Timestamp to Windows Filetime",
+            "DateTime Delta",
             "Extract dates",
             "Get Time",
             "Sleep"