diff --git a/docs/data/date-pickers/localization/data.json b/docs/data/date-pickers/localization/data.json
index 2adcf451219a..66ace3121b1b 100644
--- a/docs/data/date-pickers/localization/data.json
+++ b/docs/data/date-pickers/localization/data.json
@@ -83,7 +83,7 @@
     "languageTag": "de-DE",
     "importName": "deDE",
     "localeName": "German",
-    "missingKeysCount": 2,
+    "missingKeysCount": 0,
     "totalKeysCount": 37,
     "githubLink": "https://github.com/mui/mui-x/blob/master/packages/x-date-pickers/src/locales/deDE.ts"
   },
diff --git a/packages/x-date-pickers/src/locales/deDE.ts b/packages/x-date-pickers/src/locales/deDE.ts
index 388bb12a4e54..e91196699371 100644
--- a/packages/x-date-pickers/src/locales/deDE.ts
+++ b/packages/x-date-pickers/src/locales/deDE.ts
@@ -78,7 +78,7 @@ const deDEPickers: Partial<PickersLocaleText<any>> = {
   fieldYearPlaceholder: (params) => 'J'.repeat(params.digitAmount),
   fieldMonthPlaceholder: (params) => (params.contentType === 'letter' ? 'MMMM' : 'MM'),
   fieldDayPlaceholder: () => 'TT',
-  fieldWeekDayPlaceholder: params => params.contentType === 'letter' ? 'EEEE' : 'EE',
+  fieldWeekDayPlaceholder: (params) => (params.contentType === 'letter' ? 'EEEE' : 'EE'),
   fieldHoursPlaceholder: () => 'hh',
   fieldMinutesPlaceholder: () => 'mm',
   fieldSecondsPlaceholder: () => 'ss',