diff --git a/Custom-Images-Filename-Name-and-Subdirectory.md b/Custom-Images-Filename-Name-and-Subdirectory.md
index 2f76689..97de8ae 100644
--- a/Custom-Images-Filename-Name-and-Subdirectory.md
+++ b/Custom-Images-Filename-Name-and-Subdirectory.md
@@ -58,6 +58,7 @@ user can chain these patterns together, forming a filename that suits their use
 | `[negative_prompt_hash]`<br>`[negative_prompt_hash<N>]` | The first 8 or `N` characters of the negative prompt's SHA-256 hash | 1girl -> 6362d0d2<br>(1girl:1.1) -> 0102e068 |
 | `[full_prompt_hash]`<br>`[full_prompt_hash<N>]` | The first 8 or `N` characters of the `<prompt> <negative_prompt>`'s SHA-256 hash | 1girl -> 6362d0d2<br>(1girl:1.1) -> 0102e068 |
 | `[clip_skip]` | CLIP stop at last layers | 1 |
+| `[randn_source]` | Random number generator source | CPU |
 | `denoising` | denoising_strength if applicable | 0.5 |
 | `[batch_number]` | the Nth image in a single batch job | BatchNo_[batch_number] -> BatchNo_3
 | `[batch_size]`   | Batch size | [1234567890,1234567891,1234567892,1234567893] -> 4