diff --git a/types/index.d.ts b/types/index.d.ts
index 8aa282d3..3c1f5aba 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -97,10 +97,14 @@ interface EncoderOptions {
 
 /**
  * A projection function that is used when unwrapping unions.
- * This function is called at schema parsing time on each union with its branches' types.
- * If it returns a non-null (function) value, that function will be called each time a value's branch needs to be inferred and should return the branch's index.
+ * This function is called at schema parsing time on each union with its branches'
+ * types.
+ * If it returns a non-null (function) value, that function will be called each
+ * time a value's branch needs to be inferred and should return the branch's
+ * index.
  * The index muss be a number between 0 and length-1 of the passed types.
- * In this case (a branch index) the union will use an unwrapped representation. Otherwise (undefined), the union will be wrapped.
+ * In this case (a branch index) the union will use an unwrapped representation.
+ * Otherwise (undefined), the union will be wrapped.
  */
 type BranchProjection = (types: ReadonlyArray<Type>) =>
   | ((val: unknown) => number)