diff --git a/src/lib.rs b/src/lib.rs
index 9e74df8..2f283c7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -274,7 +274,7 @@ pub use error::{EvalexprError, EvalexprResult};
 pub use function::Function;
 pub use interface::*;
 pub use tree::Node;
-pub use value::{FloatType, IntType, TupleType, Value};
+pub use value::{FloatType, IntType, TupleType, Value, value_type::ValueType};
 
 mod context;
 pub mod error;
diff --git a/src/value/value_type.rs b/src/value/value_type.rs
index ded6cc0..360bf08 100644
--- a/src/value/value_type.rs
+++ b/src/value/value_type.rs
@@ -3,10 +3,15 @@ use Value;
 /// The type of a `Value`.
 #[derive(Clone, Copy, Eq, PartialEq)]
 pub enum ValueType {
+    /// The `Value::String` type.
     String,
+    /// The `Value::Float` type.
     Float,
+    /// The `Value::Int` type.
     Int,
+    /// The `Value::Boolean` type.
     Boolean,
+    /// The `Value::Tuple` type.
     Tuple,
 }