diff --git a/danger/tailwindcss/Dangerfile b/danger/tailwindcss/Dangerfile
index 2975d373abdcd3e832e1261581a3a87a5319f995..f32e6d0d7cac15f2174e529e4e3115449f4c86eb 100644
--- a/danger/tailwindcss/Dangerfile
+++ b/danger/tailwindcss/Dangerfile
@@ -46,6 +46,11 @@ module Danger
     def files_with_interpolated_utils(files, pattern)
       files.select do |file|
         diff = @git.diff_for_file(file)
+
+        # When a file is just moved around it appears in the changed files list
+        # but the diff is empty so we are skipping it.
+        next if diff.nil?
+
         diff.patch.each_line.any? do |line|
           line.start_with?('+') && line.match?(pattern)
         end