diff --git a/keyboard/toshi/readme.md b/keyboard/toshi/readme.md
index 2bade91d..45e23533 100644
--- a/keyboard/toshi/readme.md
+++ b/keyboard/toshi/readme.md
@@ -1 +1,3 @@
 Toshi with negative bias for LEDs as diodes. Adjust column read delay as needed.
+
+https://git.40percent.club/di0ib/tmk_keyboard/src/branch/master/keyboard/toshi/matrix.c#L84
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