diff --git a/DuckDB.NET.Data/DuckDBConnection.cs b/DuckDB.NET.Data/DuckDBConnection.cs
index 80cb484..35a9297 100644
--- a/DuckDB.NET.Data/DuckDBConnection.cs
+++ b/DuckDB.NET.Data/DuckDBConnection.cs
@@ -98,6 +98,7 @@ protected override DbCommand CreateDbCommand()
 
         public DuckDBAppender CreateAppender(string table)
         {
+            EnsureConnectionOpen();
             if (NativeMethods.Appender.DuckDBAppenderCreate(NativeConnection, null, table, out var nativeAppender) == DuckDBState.DuckDBError)
             {
                 try
@@ -135,4 +136,4 @@ private void EnsureConnectionOpen([CallerMemberName]string operation = "")
             }
         }
     }
-}
\ No newline at end of file
+}