diff --git a/common/resources.tf b/common/resources.tf
index 613aa98..c8babaa 100644
--- a/common/resources.tf
+++ b/common/resources.tf
@@ -41,7 +41,7 @@ locals {
   )
   metadata_tags = merge(
     var.metadata_tags,
-    { for k, v in local.enforced_tags : format("x-amzn-meta-%v", replace(k, "\\W", "_")) => v }
+    { for k, v in local.enforced_tags : format("x-amzn-meta-%v", replace(k, "/\\W/", "_")) => v }
   )
 }