diff --git a/builtin/builtin.mbti b/builtin/builtin.mbti
index bebef7700..f96235675 100644
--- a/builtin/builtin.mbti
+++ b/builtin/builtin.mbti
@@ -179,6 +179,7 @@ impl BigInt {
 impl Show for BigInt
 
 pub(all) type! Failure String
+impl Show for Failure
 
 type Hasher
 impl Hasher {
diff --git a/builtin/show.mbt b/builtin/show.mbt
index 5d233d7e4..f4fe8cf49 100644
--- a/builtin/show.mbt
+++ b/builtin/show.mbt
@@ -136,6 +136,18 @@ pub impl Show for String with output(self, logger) {
 ///|
 pub impl Show for String with to_string(self) { self }
 
+///|
+pub impl Show for Failure with to_string(self) {
+  let Failure(msg) = self
+  msg
+}
+
+///|
+pub impl Show for Failure with output(self, logger) {
+  let Failure(msg) = self
+  msg.output(logger)
+}
+
 ///|
 /// Returns a valid MoonBit string literal representation of a string,
 /// add quotes and escape special characters.