diff --git a/src/error/index.ts b/src/error/index.ts
new file mode 100644
index 0000000..387aaa2
--- /dev/null
+++ b/src/error/index.ts
@@ -0,0 +1,4 @@
+export * from './call';
+export * from './io';
+export * from './typed';
+export * from './unknown';
diff --git a/src/index.ts b/src/index.ts
index 395d8f5..cdbf126 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,2 +1,3 @@
 export * from './monad';
 export * from './computation';
+export * from './error';