diff --git a/app/models/project.rb b/app/models/project.rb
index 381e9067ad12ebbdf5cc331b6a951f56a44d4d2f..5298348b74d5ce6e756d0c57d6d455cc0bd71c1c 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -536,7 +536,7 @@ class Project < ActiveRecord::Base
 
   def ci_config_file=(value)
     # Strip all leading slashes so that //foo -> foo
-    super(value&.sub(%r{\A/+}, ''))
+    super(value&.sub(%r{\A/+}, '')&.delete("\0"))
   end
 
   def import_url=(value)