diff --git a/messages/de.json b/messages/de.json
index a271c6a83..49891b4d7 100644
--- a/messages/de.json
+++ b/messages/de.json
@@ -3877,7 +3877,8 @@
       "statusRevoked": "Widerrufen",
       "statusExpired": "Abgelaufen",
       "inactiveTitle": "Widerrufen und abgelaufen ({count})"
-    }
+    },
+    "genderOther": "Divers"
   },
   "admin": {
     "title": "Administration",
diff --git a/messages/en.json b/messages/en.json
index 2a470fc3a..e55e0d75b 100644
--- a/messages/en.json
+++ b/messages/en.json
@@ -3877,7 +3877,8 @@
       "statusRevoked": "Revoked",
       "statusExpired": "Expired",
       "inactiveTitle": "Revoked and expired ({count})"
-    }
+    },
+    "genderOther": "Other"
   },
   "admin": {
     "title": "Administration",
diff --git a/messages/es.json b/messages/es.json
index 8fecd5fc0..c39d085e6 100644
--- a/messages/es.json
+++ b/messages/es.json
@@ -3877,7 +3877,8 @@
       "statusRevoked": "Revocado",
       "statusExpired": "Caducado",
       "inactiveTitle": "Revocados y caducados ({count})"
-    }
+    },
+    "genderOther": "Otro"
   },
   "admin": {
     "title": "Administration",
diff --git a/messages/fr.json b/messages/fr.json
index ca24b7c24..c6e315957 100644
--- a/messages/fr.json
+++ b/messages/fr.json
@@ -3877,7 +3877,8 @@
       "statusRevoked": "Révoqué",
       "statusExpired": "Expiré",
       "inactiveTitle": "Révoqués et expirés ({count})"
-    }
+    },
+    "genderOther": "Autre"
   },
   "admin": {
     "title": "Administration",
diff --git a/messages/it.json b/messages/it.json
index 28ad42835..faf92c4cb 100644
--- a/messages/it.json
+++ b/messages/it.json
@@ -3877,7 +3877,8 @@
       "statusRevoked": "Revocato",
       "statusExpired": "Scaduto",
       "inactiveTitle": "Revocati e scaduti ({count})"
-    }
+    },
+    "genderOther": "Altro"
   },
   "admin": {
     "title": "Administration",
diff --git a/messages/pl.json b/messages/pl.json
index 0d45c451d..f451696bf 100644
--- a/messages/pl.json
+++ b/messages/pl.json
@@ -3877,7 +3877,8 @@
       "statusRevoked": "Unieważniony",
       "statusExpired": "Wygasły",
       "inactiveTitle": "Unieważnione i wygasłe ({count})"
-    }
+    },
+    "genderOther": "Inna"
   },
   "admin": {
     "title": "Administracja",
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index e49884e87..a9eb00922 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -48,7 +48,7 @@ model User {
   // Profile
   heightCm    Float?    @map("height_cm")
   dateOfBirth DateTime? @map("date_of_birth")
-  gender      String?   @map("gender") // "MALE" | "FEMALE" | null = keine Angabe
+  gender      String?   @map("gender") // "MALE" | "FEMALE" | "OTHER" | null = keine Angabe
   timezone    String    @default("Europe/Berlin")
 
   // Codex OAuth (ChatGPT subscription)
diff --git a/src/components/settings/account-section.tsx b/src/components/settings/account-section.tsx
index 2ef26422c..975c76fe1 100644
--- a/src/components/settings/account-section.tsx
+++ b/src/components/settings/account-section.tsx
@@ -448,6 +448,7 @@ export function AccountSection() {
                 <option value="">{t("settings.genderNone")}</option>
                 <option value="MALE">{t("settings.genderMale")}</option>
                 <option value="FEMALE">{t("settings.genderFemale")}</option>
+                <option value="OTHER">{t("settings.genderOther")}</option>
               </NativeSelect>
               <p className="text-muted-foreground text-xs">
                 {t("settings.genderHint")}
diff --git a/src/lib/validations/auth.ts b/src/lib/validations/auth.ts
index 7c899cf61..761ba630f 100644
--- a/src/lib/validations/auth.ts
+++ b/src/lib/validations/auth.ts
@@ -38,7 +38,7 @@ export const profileSchema = z.object({
   email: z.email("Invalid email address").nullable().optional(),
   heightCm: z.number().min(50).max(300).nullable().optional(),
   dateOfBirth: z.string().nullable().optional(), // ISO date string
-  gender: z.enum(["MALE", "FEMALE"]).nullable().optional(),
+  gender: z.enum(["MALE", "FEMALE", "OTHER"]).nullable().optional(),
   // v1.7.0 — optional patient-identity fields for the health-record
   // export cover + FHIR Patient resource. All optional, never required.
   fullName: z.string().trim().max(120).nullable().optional(),