diff --git a/packages/amino/src/signdoc.ts b/packages/amino/src/signdoc.ts
index 54bf86b0..5f9eb168 100644
--- a/packages/amino/src/signdoc.ts
+++ b/packages/amino/src/signdoc.ts
@@ -12,6 +12,7 @@ export interface AminoMsg {
 export interface StdFee {
   readonly amount: readonly Coin[];
   readonly gas: string;
+  readonly granter?: string;
 }
 
 /**