diff --git a/lawnchair/src/app/lawnchair/backup/LawnchairBackup.kt b/lawnchair/src/app/lawnchair/backup/LawnchairBackup.kt
index 7135cba946..a688a05561 100644
--- a/lawnchair/src/app/lawnchair/backup/LawnchairBackup.kt
+++ b/lawnchair/src/app/lawnchair/backup/LawnchairBackup.kt
@@ -123,7 +123,7 @@ class LawnchairBackup(
         )
 
         fun generateBackupFileName(): String {
-            val fileName = "Lawnchair Backup ${SimpleDateFormat.getDateTimeInstance().format(Date())}"
+            val fileName = "Lawnchair_Backup ${SimpleDateFormat.getDateTimeInstance().format(Date())}"
             return "$fileName.lawnchairbackup"
         }