diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 330c865c6..3fb2f4313 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -1,4 +1,5 @@
 # Contributors
+
 | GitHub user      | Real Name         | Affiliation | Date       |
 | ---------------- | ----------------- | ----------- | ---------- |
 | andrewcoughtrie  | Andrew Coughtrie  | Met Office  | 2025.12.12 |
@@ -14,3 +15,4 @@
 | harry-shepherd   | Harry Shepherd    | Met Office  | 2026-01-08 |
 | EdHone           | Ed Hone           | Met Office  | 2026-01-09 |
 | tom-j-h          | Tom Hill          | Met Office  | 2026-01-19 |
+| mo-alistairp     | Alistair Pirrie   | Met Office  | 2026-01-12 |
diff --git a/infrastructure/source/kernel_metadata/argument_mod.F90 b/infrastructure/source/kernel_metadata/argument_mod.F90
index 1d58541b0..6a8e585bf 100644
--- a/infrastructure/source/kernel_metadata/argument_mod.F90
+++ b/infrastructure/source/kernel_metadata/argument_mod.F90
@@ -46,6 +46,7 @@ module argument_mod
   !> @defgroup argument_type Enumeration of argument type property descriptors.
   !> @{
   integer, public, parameter :: GH_SCALAR              = 397
+  integer, public, parameter :: GH_SCALAR_ARRAY        = 973
   integer, public, parameter :: GH_FIELD               = 507
   integer, public, parameter :: GH_OPERATOR            = 735
   integer, public, parameter :: GH_COLUMNWISE_OPERATOR = 841