diff --git a/.travis/autobrew.py b/.travis/autobrew.py
index 80d28a07..57abaac3 100644
--- a/.travis/autobrew.py
+++ b/.travis/autobrew.py
@@ -23,6 +23,10 @@ class Ocrmypdf < Formula
   depends_on "unpaper"
   depends_on "qpdf"
 
+  # mactex installs its own ghostscript by default which causes problems
+  # mactex users should use caskroom/cask/mactex-no-ghostscript instead
+  conflicts_with cask: "caskroom/cask/mactex"
+
   # For Pillow source install
   depends_on "openjpeg"
   depends_on "freetype"