diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/backup/full/FullBackupManager.kt b/app/src/main/java/eu/kanade/tachiyomi/data/backup/full/FullBackupManager.kt
index bb26598a62..e065e932c1 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/backup/full/FullBackupManager.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/backup/full/FullBackupManager.kt
@@ -3,6 +3,7 @@ package eu.kanade.tachiyomi.data.backup.full
 import android.content.Context
 import android.net.Uri
 import com.hippo.unifile.UniFile
+import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.backup.AbstractBackupManager
 import eu.kanade.tachiyomi.data.backup.BackupCreateService.Companion.BACKUP_CATEGORY
 import eu.kanade.tachiyomi.data.backup.BackupCreateService.Companion.BACKUP_CATEGORY_MASK
@@ -85,6 +86,10 @@ class FullBackupManager(context: Context) : AbstractBackupManager(context) {
                 ?: throw Exception("Couldn't create backup file")
 
             val byteArray = parser.encodeToByteArray(BackupSerializer, backup!!)
+            if (byteArray.isEmpty()) {
+                throw IllegalStateException(context.getString(R.string.empty_backup_error))
+            }
+
             file.openOutputStream().sink().gzip().buffer().use { it.write(byteArray) }
             return file.uri.toString()
         } catch (e: Exception) {
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index aefbee9e6b..960b0f7a7c 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -731,6 +731,7 @@
     <string name="file_is_missing_data">File is missing data.</string>
     <string name="backup_has_no_manga">Backup does not contain any manga.</string>
     <string name="backup_failed">Backup failed</string>
+    <string name="empty_backup_error">No library entries to back up</string>
     <string name="backup_created">Backup created</string>
     <string name="restore_completed">Restore completed</string>
     <string name="restore_error">Failed to restore backup</string>