diff --git a/lightstep-haskell.cabal b/lightstep-haskell.cabal
--- a/lightstep-haskell.cabal
+++ b/lightstep-haskell.cabal
@@ -1,7 +1,7 @@
 cabal-version: 2.4
 
 name:           lightstep-haskell
-version:        0.1.1
+version:        0.1.2
 synopsis:       LightStep OpenTracing client library
 description:    LightStep OpenTracing client library. Uses GRPC transport via proto-lens.
 category:       Tools
diff --git a/src/LightStep/HighLevel/IO.hs b/src/LightStep/HighLevel/IO.hs
--- a/src/LightStep/HighLevel/IO.hs
+++ b/src/LightStep/HighLevel/IO.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE OverloadedStrings #-}
 module LightStep.HighLevel.IO 
   ( module LightStep.HighLevel.IO
   , module LightStep.LowLevel
@@ -28,7 +29,7 @@
   bracket
     (pushSpan opName)
     popSpan 
-    (const action)
+    (const (onException action (setTag "error" "true")))
 
 pushSpan :: T.Text -> IO ()
 pushSpan opName = do