diff --git a/DEVELOPING.md b/DEVELOPING.md
index cbfdfb38..6ba9bae4 100644
--- a/DEVELOPING.md
+++ b/DEVELOPING.md
@@ -19,7 +19,7 @@ previous iteration of Dai was called Single Collateral Dai (SCD), or
 Dai has three different numerical units: `wad`, `ray` and `rad`
 
 - `wad`: fixed point decimal with 18 decimals (for basic quantities, e.g. balances)
-- `ray`: fixed point decimal with 27 decimals (for precise quantites, e.g. ratios)
+- `ray`: fixed point decimal with 27 decimals (for precise quantities, e.g. ratios)
 - `rad`: fixed point decimal with 45 decimals (result of integer multiplication with a `wad` and a `ray`)
 
 `wad` and `ray` units will be familiar from SCD. `rad` is a new unit and