diff --git a/Cargo.lock b/Cargo.lock
index e763805..26dc89d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -886,6 +886,7 @@ version = "0.23.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d2cafc7c74096c336d9d27145f7ebd4f4b6f95ba16aa5a282387267e6925cb58"
 dependencies = [
+ "cc",
  "pkg-config",
  "vcpkg",
 ]
diff --git a/mps-interpreter/Cargo.toml b/mps-interpreter/Cargo.toml
index 841f0ad..6400cae 100644
--- a/mps-interpreter/Cargo.toml
+++ b/mps-interpreter/Cargo.toml
@@ -6,7 +6,7 @@ license = "LGPL-2.1-only OR GPL-2.0-or-later"
 readme = "README.md"
 
 [dependencies]
-rusqlite = { version = "0.26.3" }
+rusqlite = { version = "0.26.3", features = ["bundled"] }
 symphonia = { version = "0.4.0", optional = true, features = [
     "aac", "flac", "mp3", "pcm", "vorbis", "isomp4", "ogg", "wav"
 ] }
diff --git a/mps-interpreter/src/lang/function.rs b/mps-interpreter/src/lang/function.rs
index 9326ede..9d18515 100644
--- a/mps-interpreter/src/lang/function.rs
+++ b/mps-interpreter/src/lang/function.rs
@@ -2,7 +2,9 @@ use std::collections::VecDeque;
 //use std::fmt::{Debug, Display, Error, Formatter};
 use std::marker::PhantomData;
 
-use crate::lang::utility::{assert_empty, assert_token, assert_token_raw, assert_token_raw_back};
+use crate::lang::utility::{assert_token, assert_token_raw, assert_token_raw_back};
+#[cfg(debug_assertions)]
+use crate::lang::utility::assert_empty;
 use crate::lang::MpsLanguageDictionary;
 use crate::lang::SyntaxError;
 use crate::lang::{BoxedMpsOpFactory, MpsOp};
diff --git a/mps-interpreter/src/lang/utility.rs b/mps-interpreter/src/lang/utility.rs
index bea6791..835696e 100644
--- a/mps-interpreter/src/lang/utility.rs
+++ b/mps-interpreter/src/lang/utility.rs
@@ -169,6 +169,7 @@ pub fn assert_type(tokens: &mut VecDeque<MpsToken>) -> Result<MpsTypePrimitive,
     }
 }
 
+#[cfg(debug_assertions)]
 pub fn assert_empty(tokens: &mut VecDeque<MpsToken>) -> Result<(), SyntaxError> {
     match tokens.pop_front() {
         None => Ok(()),