diff --git a/docker/services/tinc b/docker/services/tinc
index 9724776..945fb10 100644
--- a/docker/services/tinc
+++ b/docker/services/tinc
@@ -20,7 +20,7 @@
 {{ end }}
     sysctls:
 {{ if ne "true" "${ipv6_enabled}" }}
-      - net.ipv6.conf.all.disable_ipv6: 1
+      - net.ipv6.conf.all.disable_ipv6=1
 {{ else }}
-      - net.ipv6.conf.all.disable_ipv6: 0
+      - net.ipv6.conf.all.disable_ipv6=0
 {{ end }}