diff --git a/ArchiSteamFarm.Tests/Trading.cs b/ArchiSteamFarm.Tests/Trading.cs
index a2ee00fb2..ca2006c9c 100644
--- a/ArchiSteamFarm.Tests/Trading.cs
+++ b/ArchiSteamFarm.Tests/Trading.cs
@@ -52,6 +52,30 @@ public sealed class Trading {
 		Assert.IsFalse(IsTradeNeutralOrBetter(inventory, itemsToGive, itemsToReceive));
 	}
 
+	[TestMethod]
+	public void Issue3203() {
+		HashSet<Asset> inventory = [
+			CreateItem(1, amount: 2),
+			CreateItem(2, amount: 6),
+			CreateItem(3),
+			CreateItem(4)
+		];
+
+		HashSet<Asset> itemsToGive = [
+			CreateItem(1),
+			CreateItem(2, amount: 2)
+		];
+
+		HashSet<Asset> itemsToReceive = [
+			CreateItem(5),
+			CreateItem(6),
+			CreateItem(7)
+		];
+
+		Assert.IsTrue(IsFairExchange(itemsToGive, itemsToReceive));
+		Assert.IsTrue(IsTradeNeutralOrBetter(inventory, itemsToGive, itemsToReceive));
+	}
+
 	[TestMethod]
 	public void MismatchRarityIsNotFair() {
 		HashSet<Asset> itemsToGive = [
diff --git a/ArchiSteamFarm/Steam/Exchange/Trading.cs b/ArchiSteamFarm/Steam/Exchange/Trading.cs
index ec134f9d4..3157115e4 100644
--- a/ArchiSteamFarm/Steam/Exchange/Trading.cs
+++ b/ArchiSteamFarm/Steam/Exchange/Trading.cs
@@ -178,7 +178,9 @@ public sealed class Trading : IDisposable {
 			}
 
 			// Otherwise, fill the missing holes in our data if needed, since we actually had zeros there
-			for (byte i = 0; i < afterAmounts.Count - beforeAmounts.Count; i++) {
+			byte missingAmounts = (byte) (afterAmounts.Count - beforeAmounts.Count);
+
+			for (byte i = 0; i < missingAmounts; i++) {
 				beforeAmounts.Insert(0, 0);
 			}