diff --git a/lib/liudesk_cmdb/util.rb b/lib/liudesk_cmdb/util.rb
index a548da3e013f248b3c9945f8f73d2add3b589841..9c7ad815bfe875ae88d822578d26c8a60aeda1e4 100644
--- a/lib/liudesk_cmdb/util.rb
+++ b/lib/liudesk_cmdb/util.rb
@@ -3,7 +3,7 @@
 # String extensions for camel/snake case conversion
 class String
   def _cmdb_snake_case
-    gsub(/::/, "/")
+    gsub("::", "/")
       .gsub(/([A-Z]+)([A-Z][a-z])/, '\1_\2')
       .gsub(/([a-z\d])([A-Z])/, '\1_\2')
       .tr("-", "_")