diff --git a/src/api/info/_methods/marginTable.ts b/src/api/info/_methods/marginTable.ts
index bf71dd2f..e415873a 100644
--- a/src/api/info/_methods/marginTable.ts
+++ b/src/api/info/_methods/marginTable.ts
@@ -16,6 +16,8 @@ export const MarginTableRequest = /* @__PURE__ */ (() => {
     type: v.literal("marginTable"),
     /** Margin requirements table. */
     id: UnsignedInteger,
+    /** DEX name (empty string for main dex). */
+    dex: v.optional(v.string()),
   });
 })();
 
diff --git a/tests/api/info/marginTable.test.ts b/tests/api/info/marginTable.test.ts
index f1c1d5f3..12765427 100644
--- a/tests/api/info/marginTable.test.ts
+++ b/tests/api/info/marginTable.test.ts
@@ -14,6 +14,8 @@ runTest({
   codeTestFn: async (_t, client) => {
     const params: MarginTableParameters[] = [
       { id: 1 },
+      { id: 51, dex: "" }, // main dex
+      { id: 51, dex: "flx" }, // other dex
     ];
 
     const data = await Promise.all(params.map((p) => client.marginTable(p)));