diff --git a/android/data/src/main/kotlin/se/hagstedt/kvitt/data/api/Endpoints.kt b/android/data/src/main/kotlin/se/hagstedt/kvitt/data/api/Endpoints.kt
index ee74427..f06fc75 100644
--- a/android/data/src/main/kotlin/se/hagstedt/kvitt/data/api/Endpoints.kt
+++ b/android/data/src/main/kotlin/se/hagstedt/kvitt/data/api/Endpoints.kt
@@ -169,7 +169,8 @@ data class FcmMessageDto(val message: FcmMessageBody)
 
 @Serializable
 data class FcmMessageBody(
-    val token: String,
+    /** The target Firebase Installation ID (HTTP v1 `message.fid`, D-096). */
+    val fid: String,
     val android: FcmAndroidConfig,
     val data: Map<String, String>,
 )