diff --git a/hooks/pre-receive b/hooks/pre-receive
index 09fa42b7dbce1c222af5a2666455a81026dae8e0..16c659db9eabff37d2383a844dc3b3be8cbe66d1 100755
--- a/hooks/pre-receive
+++ b/hooks/pre-receive
@@ -4,8 +4,8 @@
 # will be processed properly.
 
 refs = $stdin.read
-key_id = ENV.delete('GL_ID')
-protocol = ENV.delete('GL_PROTOCOL')
+key_id  = ENV['GL_ID']
+protocol = ENV['GL_PROTOCOL']
 repo_path = Dir.pwd
 
 require_relative '../lib/gitlab_custom_hook'
@@ -21,5 +21,7 @@ if GitlabAccess.new(repo_path, key_id, refs, protocol).exec &&
     GitlabReferenceCounter.new(repo_path).increase
   exit 0
 else
+  ENV['GL_ID'] = nil
+
   exit 1
 end