diff --git a/Cargo.lock b/Cargo.lock
index 90a978c51..c152e806b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1579,6 +1579,7 @@ dependencies = [
  "num-bigint",
  "num-complex",
  "serde",
+ "static_assertions",
 ]
 
 [[package]]
diff --git a/bytecode/Cargo.toml b/bytecode/Cargo.toml
index db83f9010..1457072b8 100644
--- a/bytecode/Cargo.toml
+++ b/bytecode/Cargo.toml
@@ -17,3 +17,4 @@ num-complex = { version = "0.4.0", features = ["serde"] }
 serde = { version = "1.0.136", features = ["derive"] }
 itertools = "0.10.3"
 bstr = "0.2.17"
+static_assertions = "1.1.0"
diff --git a/bytecode/src/lib.rs b/bytecode/src/lib.rs
index 416475d7a..36d66f61a 100644
--- a/bytecode/src/lib.rs
+++ b/bytecode/src/lib.rs
@@ -394,6 +394,7 @@ pub enum Instruction {
     GetANext,
     EndAsyncFor,
 }
+static_assertions::assert_eq_size!(Instruction, u64);
 
 use self::Instruction::*;