diff --git a/src/expr/impl/src/scalar/encrypt.rs b/src/expr/impl/src/scalar/encrypt.rs
new file mode 100644
index 0000000000000..691a35b9d9826
--- /dev/null
+++ b/src/expr/impl/src/scalar/encrypt.rs
@@ -0,0 +1,13 @@
+// Copyright 2024 RisingWave Labs
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
diff --git a/src/expr/impl/src/scalar/mod.rs b/src/expr/impl/src/scalar/mod.rs
index bc925e3f2831c..0417d2eff5d17 100644
--- a/src/expr/impl/src/scalar/mod.rs
+++ b/src/expr/impl/src/scalar/mod.rs
@@ -78,6 +78,7 @@ mod to_char;
 mod to_jsonb;
 mod vnode;
 pub use to_jsonb::*;
+mod encrypt;
 mod external;
 mod to_timestamp;
 mod translate;