diff --git a/client/PublicRequestTypes.ts b/client/PublicRequestTypes.ts
index f6dedc11..60b0c937 100644
--- a/client/PublicRequestTypes.ts
+++ b/client/PublicRequestTypes.ts
@@ -612,11 +612,18 @@ export interface SignPolygonTransactionRequest extends BasicRequest, RelayReques
     recipientLabel?: string;
     /**
      * The sender's nonce in the token contract, required when calling the
-     * contract function `executeWithApproval`.
+     * contract function `transferWithApproval`.
      */
     approval?: {
         tokenNonce: number,
     };
+    /**
+     * The sender's nonce in the token contract, required when calling the
+     * contract function `transferWithPermit`.
+     */
+    permit?: {
+        tokenNonce: number,
+    };
 }
 
 export interface SignedPolygonTransaction {
diff --git a/src/lib/RequestTypes.ts b/src/lib/RequestTypes.ts
index 74c1610f..7fa425da 100644
--- a/src/lib/RequestTypes.ts
+++ b/src/lib/RequestTypes.ts
@@ -154,7 +154,12 @@ export interface ParsedAddBtcAddressesRequest extends ParsedSimpleRequest {
 
 export interface ParsedSignPolygonTransactionRequest extends ParsedBasicRequest, RelayRequest {
     recipientLabel?: string;
-    tokenApprovalNonce?: number;
+    approval?: {
+        tokenNonce: number,
+    };
+    permit?: {
+        tokenNonce: number,
+    };
 }
 
 /**