1 Erratum to: Math. Z. DOI 10.1007/s00209-017-1900-5

In the original publication, the author of the appendix section has been included as a co-author of the article inadvertently. Hence, the author group is corrected with this erratum.

Further, the article title has been updated as given below:

Counting number fields in fibers (with an Appendix by Jean Gillibert)

The original article has been corrected.