diff --git a/doc/manual/source/store/derivation/index.md b/doc/manual/source/store/derivation/index.md
index 4516d5f37..aa30adae9 100644
--- a/doc/manual/source/store/derivation/index.md
+++ b/doc/manual/source/store/derivation/index.md
@@ -189,7 +189,7 @@ This ensures that there is a canonical [store path] used to refer to the derivat
 > **Note**
 >
 > Currently, the canonical encoding for every derivation is the "ATerm" format,
-> but this is subject to change for types derivations which are not yet stable.
+> but this is subject to change for the types of derivations which are not yet stable.
 
 Regardless of the format used, when serializing a derivation to a store object, that store object will be content-addressed.