diff --git a/src/TypeErrors.md b/src/TypeErrors.md
index 75e96b8..c7216fd 100644
--- a/src/TypeErrors.md
+++ b/src/TypeErrors.md
@@ -21,11 +21,9 @@ Utility functions `asScore` etc
 The `lens` library is famously huge. The concepts you need to use Music Suite are
 `Lens`, `Prism`, `Iso` and `Traversal`.
 
-If you get an error on the form
+The most common error in code that uses lenses is mixing up a lenses with functions, i.e. writing `duration` when you mean `view duration`. This will give you an error that looks something like this:
 
-    Couldn't match expected type `Time' with actual type `a0 -> f0 a0'
-
-you probably mixed up a lens or getter with an acessor (i.e. `duration` vs `view duration`).
+    Couldn't match expected type `Duration' with actual type `a0 -> f0 a0'
 
 ### Get an intuition for what the classes and type functions do