diff --git a/src/models.ts b/src/models.ts
index 42c0ffc..eb8909b 100644
--- a/src/models.ts
+++ b/src/models.ts
@@ -12,5 +12,5 @@ export type OSCMessage = {
 export type OSCTypeConverter = {
   toBuffer: (value: string | number | Buffer | boolean) => Buffer | undefined;
   fromString: (string: string) => string | number | Buffer | boolean;
-  fromBuffer?: (buffer: Buffer) => [string | number | Buffer | boolean | undefined, Buffer];
+  fromBuffer: (buffer: Buffer) => [string | number | Buffer | boolean | undefined, Buffer];
 };