diff --git a/hosts/freun-dev/configuration.nix b/hosts/freun-dev/configuration.nix
index 9c97be1..2e17225 100644
--- a/hosts/freun-dev/configuration.nix
+++ b/hosts/freun-dev/configuration.nix
@@ -55,7 +55,7 @@ in
     };
     "_dmarc".TXT = {
       ttl = 86400;
-      values = [ "v=DMARC1; p=reject" ];
+      values = [ "v=DMARC1\\; p=reject" ];
     };
     "uberspace._domainkey".TXT = {
       ttl = 86400;