diff --git a/src/Init/System/IO.lean b/src/Init/System/IO.lean
index 6d6b1ddb83..20261fcece 100644
--- a/src/Init/System/IO.lean
+++ b/src/Init/System/IO.lean
@@ -196,7 +196,7 @@ causing the side effect to occur at initialization time, even if it would otherw
 @[inline] unsafe def unsafeEIO (fn : EIO ε α) : Except ε α :=
   unsafeBaseIO fn.toBaseIO
 
-@[inline, inherit_doc EIO] unsafe def unsafeIO (fn : IO α) : Except IO.Error α :=
+@[inline, inherit_doc unsafeEIO] unsafe def unsafeIO (fn : IO α) : Except IO.Error α :=
   unsafeEIO fn