diff --git a/libs/utils/BackupData.cpp b/libs/utils/BackupData.cpp
index 120f23d..8c9f875 100644
--- a/libs/utils/BackupData.cpp
+++ b/libs/utils/BackupData.cpp
@@ -327,7 +327,7 @@
     }
     size_t size = m_header.app.packageLen;
     char* buf = packageName->lockBuffer(size);
-    if (packageName == NULL) {
+    if (buf == NULL) {
         packageName->unlockBuffer();
         m_status = ENOMEM;
         return m_status;