diff --git a/src/strings/cy.json b/src/strings/cy.json
index 70b4ffa896..c3640764c7 100644
--- a/src/strings/cy.json
+++ b/src/strings/cy.json
@@ -19,7 +19,7 @@
     "HeaderBranding": "Brandio",
     "HeaderApp": "Rhaglen",
     "HeaderAlert": "Effro",
-    "HeaderAdmin": "Gweinyddol",
+    "HeaderAdmin": "Gweinyddu",
     "HeaderActivity": "Gweithgarwch",
     "GuideProviderLogin": "Mewngofnodi",
     "Guide": "Canllaw",