diff --git a/CHIPs/chip-0004.md b/CHIPs/chip-0004.md
index 121af1e5..ba329428 100644
--- a/CHIPs/chip-0004.md
+++ b/CHIPs/chip-0004.md
@@ -7,7 +7,7 @@ Editor        | [Will Riches](https://github.com/wriches)
 Comments-URI  | [https://github.com/Chia-Network/chips/pull/18](https://github.com/Chia-Network/chips/pull/18)
 Status        | Final
 Category      | Standards Track
-Sub-Category  | Chialisp
+Sub-Category  | Primitive
 Created       | 2022-06-05
 Requires      | [0005](https://github.com/Chia-Network/chips/blob/main/CHIPs/chip-0005.md), [Singleton Standard](https://chialisp.com/singletons/#code)
 Replaces      | None
@@ -745,6 +745,7 @@ This CHIP was reviewed for consistency and obvious bugs.
 
 ## Errata
  * 2024-10-24 -- original links used dynamic references to the main branch, this updates those to static links for the respective docs eliminating the potential of broken links in the future.
+ * 2025-09-29 -- This CHIP's sub-category was originally listed as `Chialisp`. That category is meant for changes to the language itself. To correct this mistake, the new sub-category for this CHIP will be `Primitive`.
 
 ## Copyright
 Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).