diff --git a/CHANGELOG.md b/CHANGELOG.md
index af063f94a..e8b4879c1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,10 @@ Update this for each mainnet deployment.
 
 ## mainnet
 
+Dec 16, 2022 at 16:40 Central European Standard Time
 
+Oct 8, 2022 at 14:38:31 Central European Summer Time
+https://explorer.solana.com/tx/3m8EDohkgwJZyiwpGXztBWARWQVxyhnSNDVuH467D7FPS2wxJerr79HhdhDEed5hpConHgGsKHvxtW1HJP6GixX9
 
 Oct 8, 2022 at 14:38:31 Central European Summer Time
 https://explorer.solana.com/tx/3m8EDohkgwJZyiwpGXztBWARWQVxyhnSNDVuH467D7FPS2wxJerr79HhdhDEed5hpConHgGsKHvxtW1HJP6GixX9
diff --git a/ts/client/src/client.ts b/ts/client/src/client.ts
index 8dbc123d8..d165fe2b2 100644
--- a/ts/client/src/client.ts
+++ b/ts/client/src/client.ts
@@ -1178,17 +1178,15 @@ export class MangoClient {
 
     const limitPrice = serum3MarketExternal.priceNumberToLots(price);
     const maxBaseQuantity = serum3MarketExternal.baseSizeNumberToLots(size);
-    const maxQuoteQuantity = serum3MarketExternal.decoded.quoteLotSize
-      .mul(
-        new BN(
-          1 + group.getSerum3FeeRates(orderType === Serum3OrderType.postOnly),
-        ),
-      )
-      .mul(
-        serum3MarketExternal
-          .baseSizeNumberToLots(size)
-          .mul(serum3MarketExternal.priceNumberToLots(price)),
-      );
+    const maxQuoteQuantity = new BN(
+      serum3MarketExternal.decoded.quoteLotSize.toNumber() *
+        (1 + group.getSerum3FeeRates(false)),
+    ).mul(
+      serum3MarketExternal
+        .baseSizeNumberToLots(size)
+        .mul(serum3MarketExternal.priceNumberToLots(price)),
+    );
+
     const payerTokenIndex = ((): TokenIndex => {
       if (side == Serum3Side.bid) {
         return serum3Market.quoteTokenIndex;