diff --git a/Cargo.toml b/Cargo.toml
index a865eae..b5815b9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,16 +4,17 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+bitvec = { version = "1.0.1", default-features = false, features = ["alloc"] }
+sha2 = { version = "0.10.6", default-features = false }
 
-bitvec = {version = "1.0.1", default-features = false, features = ["alloc"]}
-sha2 = {version = "0.10.6", default-features = false}
+thiserror = { version = "1", optional = true }
 
 [dev-dependencies]
 hex = "0.4.3"
 
 [features]
 default = ["std", "sufficient-memory"]
-std = []
+std = ["thiserror"]
 sufficient-memory = []
 
 [lib]
diff --git a/src/error.rs b/src/error.rs
index d753835..0ec197d 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,4 +1,10 @@
+#[cfg(feature = "std")]
+use std::fmt::{Debug, Display, Formatter, Result};
+#[cfg(feature = "std")]
+use thiserror::Error;
+
 #[derive(Debug)]
+#[cfg_attr(feature = "std", derive(Error))]
 pub enum ErrorWordList {
     DamagedWord,
     InvalidChecksum,
@@ -7,3 +13,11 @@ pub enum ErrorWordList {
     NoWord,
     WordsNumber,
 }
+
+// TODO: provide actual error descriptions.
+#[cfg(feature = "std")]
+impl Display for ErrorWordList {
+    fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+        <Self as Debug>::fmt(self, f)
+    }
+}