diff --git a/common/src/main/java/io/bitsquare/storage/FileUtil.java b/common/src/main/java/io/bitsquare/storage/FileUtil.java
index 12d2cc7996..0a2c8b85fa 100644
--- a/common/src/main/java/io/bitsquare/storage/FileUtil.java
+++ b/common/src/main/java/io/bitsquare/storage/FileUtil.java
@@ -23,7 +23,10 @@ public class FileUtil {
 
         File origFile = new File(Paths.get(dir.getAbsolutePath(), fileName).toString());
         if (origFile.exists()) {
-            File backupFileDir = new File(Paths.get(backupDir.getAbsolutePath(), fileName.replace(".", "_")).toString());
+            String dirName = "backups_" + fileName;
+            if (dirName.contains("."))
+                dirName = dirName.replace(".", "_");
+            File backupFileDir = new File(Paths.get(backupDir.getAbsolutePath(), dirName).toString());
             if (!backupFileDir.exists())
                 if (!backupFileDir.mkdir())
                     log.warn("make backupFileDir failed");