diff --git a/radio/src/storage/rambackup.cpp b/radio/src/storage/rambackup.cpp
index b5a57c832..b678a3b13 100644
--- a/radio/src/storage/rambackup.cpp
+++ b/radio/src/storage/rambackup.cpp
@@ -45,7 +45,7 @@ void rambackupWrite()
 {
   copyRadioData(&ramBackupUncompressed.radio, &g_eeGeneral);
   copyModelData(&ramBackupUncompressed.model, &g_model);
-  ramBackup->size = compress(ramBackup->data, 4094, (const uint8_t *)&ramBackupUncompressed, sizeof(ramBackupUncompressed));
+  ramBackup->size = compress(ramBackup->data, sizeof(ramBackup->data), (const uint8_t *)&ramBackupUncompressed, sizeof(ramBackupUncompressed));
   TRACE("RamBackupWrite sdsize=%d backupsize=%d rlcsize=%d", sizeof(ModelData)+sizeof(RadioData), sizeof(Backup::RamBackupUncompressed), ramBackup->size);
 }