diff --git a/src/GreenHome.DataCopy/Program.cs b/src/GreenHome.DataCopy/Program.cs
index ce1cde4..069ca84 100644
--- a/src/GreenHome.DataCopy/Program.cs
+++ b/src/GreenHome.DataCopy/Program.cs
@@ -117,8 +117,9 @@ internal static class Program
 
         foreach (var (_, table) in order)
         {
-            long src = (long)(await ScalarAsync(srcConn, $"SELECT COUNT(*) FROM {table}"))!;
-            long dst = (long)(await ScalarAsync(pgConn, $"SELECT COUNT(*) FROM \"{table}\""))!;
+            // SQL Server COUNT(*) is Int32, Postgres is Int64 — Convert handles both
+            long src = Convert.ToInt64(await ScalarAsync(srcConn, $"SELECT COUNT(*) FROM {table}"))!;
+            long dst = Convert.ToInt64(await ScalarAsync(pgConn, $"SELECT COUNT(*) FROM \"{table}\""))!;
             if (src != dst) problems++;
             Console.WriteLine($"{(src == dst ? "OK   " : "FAIL ")} {table,-28} source={src,-10} target={dst}");
         }