diff --git a/episodes/imaging-data-structure-and-formats.Rmd b/episodes/imaging-data-structure-and-formats.Rmd
index a19e025..00cd26a 100644
--- a/episodes/imaging-data-structure-and-formats.Rmd
+++ b/episodes/imaging-data-structure-and-formats.Rmd
@@ -779,7 +779,6 @@ brain lesions – white matter hyperintensities – are more clearly visible
 :::::::::::::::::::::::::::::::::
 :::::::::::::::::::::::::::::::::
 
-<a id="bonus_dicom"></a>
 ::::::::::::::::::::: challenge
 
 ### BONUS EXERCISE: DICOM to NIfTI