diff --git a/src/tests/sqlsmith/src/sql_gen/functions.rs b/src/tests/sqlsmith/src/sql_gen/functions.rs
index 01cbb0604d262..612887322b41f 100644
--- a/src/tests/sqlsmith/src/sql_gen/functions.rs
+++ b/src/tests/sqlsmith/src/sql_gen/functions.rs
@@ -129,6 +129,11 @@ impl<'a, R: Rng> SqlGenerator<'a, R> {
             input_string,
             Expr::Value(Value::SingleQuotedString(encoding.to_string())),
         ];
+        let encoded_string = Expr::Function(make_simple_func("encode", &args);
+        let args = vec![
+            encoded_string,
+            Expr::Value(Value::SingleQuotedString(encoding.to_string())),
+        ];
         Expr::Function(make_simple_func("decode", &args))
     }