2 files changed, 3 insertions, 3 deletions
diff --git a/extension/background/emscriptif.js b/extension/background/emscriptif.js
index fbd05fe6a..f94b58016 100644
--- a/extension/background/emscriptif.js
+++ b/extension/background/emscriptif.js
@@ -363,7 +363,7 @@ class SignatureStruct {
     constructor(x) {
         this.members = {};
         for (let k in x) {
-            this.set(x, x[k]);
+            this.set(k, x[k]);
         }
     }
     toPurpose(a) {
diff --git a/extension/background/emscriptif.ts b/extension/background/emscriptif.ts
index bf2f43c9b..150b68741 100644
--- a/extension/background/emscriptif.ts
+++ b/extension/background/emscriptif.ts
@@ -517,9 +517,9 @@ abstract class SignatureStruct {
   abstract purpose(): SignaturePurpose;
   private members: any = {};
 
-  constructor(x: any) {
+  constructor(x: { [name: string]: any }) {
     for (let k in x) {
-      this.set(x, x[k]);
+      this.set(k, x[k]);
     }
   }