diff --git a/crates/oxc_ecmascript/src/constant_evaluation/value_type.rs b/crates/oxc_ecmascript/src/constant_evaluation/value_type.rs
index 30613a85565ae..808a68ae3d056 100644
--- a/crates/oxc_ecmascript/src/constant_evaluation/value_type.rs
+++ b/crates/oxc_ecmascript/src/constant_evaluation/value_type.rs
@@ -61,10 +61,9 @@ impl<'a> From<&Expression<'a>> for ValueType {
     /// This function ignores the cases that throws an error, e.g. `foo * 0` can throw an error when `foo` is a bigint.
     /// To detect those cases, use [`crate::side_effects::MayHaveSideEffects::expression_may_have_side_effects`].
     fn from(expr: &Expression<'a>) -> Self {
-        // TODO: complete this
         match expr {
             Expression::BigIntLiteral(_) => Self::BigInt,
-            Expression::BooleanLiteral(_) => Self::Boolean,
+            Expression::BooleanLiteral(_) | Expression::PrivateInExpression(_) => Self::Boolean,
             Expression::NullLiteral(_) => Self::Null,
             Expression::NumericLiteral(_) => Self::Number,
             Expression::StringLiteral(_) | Expression::TemplateLiteral(_) => Self::String,
diff --git a/crates/oxc_minifier/tests/ecmascript/value_type.rs b/crates/oxc_minifier/tests/ecmascript/value_type.rs
index 45052b71ce4b3..ff420a8fb485d 100644
--- a/crates/oxc_minifier/tests/ecmascript/value_type.rs
+++ b/crates/oxc_minifier/tests/ecmascript/value_type.rs
@@ -137,6 +137,7 @@ fn binary_tests() {
     test("foo <= bar", ValueType::Boolean);
     test("foo > bar", ValueType::Boolean);
     test("foo >= bar", ValueType::Boolean);
+    test("#foo in bar", ValueType::Boolean);
 }
 
 #[test]