diff --git a/src/cryptonote_core/cryptonote_format_utils.cpp b/src/cryptonote_core/cryptonote_format_utils.cpp
index 043363c..70819df 100644
--- a/src/cryptonote_core/cryptonote_format_utils.cpp
+++ b/src/cryptonote_core/cryptonote_format_utils.cpp
@@ -860,7 +860,7 @@ namespace cryptonote
   //---------------------------------------------------------------
   bool check_proof_of_work_v2(const block& bl, difficulty_type current_diffic, crypto::hash& proof_of_work)
   {
-    if (BLOCK_MAJOR_VERSION_2 != bl.major_version ||
+    if (BLOCK_MAJOR_VERSION_2 != bl.major_version &&
         BLOCK_MAJOR_VERSION_3 != bl.major_version)
       return false;