diff --git a/src/currency_core/blockchain_storage.cpp b/src/currency_core/blockchain_storage.cpp
index dfe9c6a4..13d7d90c 100644
--- a/src/currency_core/blockchain_storage.cpp
+++ b/src/currency_core/blockchain_storage.cpp
@@ -3544,7 +3544,7 @@ bool blockchain_storage::check_tx_inputs(const transaction& tx, const crypto::ha
   if (!m_is_in_checkpoint_zone)
   {
     CHECK_AND_ASSERT_MES(tx.signatures.size() == sig_index, false, "tx signatures count differs from inputs");
-    if (!get_tx_flags(tx)&TX_FLAG_SIGNATURE_MODE_SEPARATE)
+    if (!(get_tx_flags(tx) & TX_FLAG_SIGNATURE_MODE_SEPARATE))
     {
       bool r = validate_attachment_info(tx.extra, tx.attachment, false);
       CHECK_AND_ASSERT_MES(r, false, "Failed to validate attachments in tx " << tx_prefix_hash << ": incorrect extra_attachment_info in tx.extra");
diff --git a/src/currency_core/currency_format_utils.cpp b/src/currency_core/currency_format_utils.cpp
index 673092ca..ad612fe8 100644
--- a/src/currency_core/currency_format_utils.cpp
+++ b/src/currency_core/currency_format_utils.cpp
@@ -1109,7 +1109,7 @@ namespace currency
         att_count++;
       }
     }
-    if (!flags&TX_FLAG_SIGNATURE_MODE_SEPARATE)
+    if (!(flags & TX_FLAG_SIGNATURE_MODE_SEPARATE))
     {
       //take hash from attachment and put into extra
       if (tx.attachment.size())
@@ -2374,7 +2374,7 @@ namespace currency
   //---------------------------------------------------------------
   bool is_pos_block(const block& b)
   {
-    if (!b.flags&CURRENCY_BLOCK_FLAG_POS_BLOCK)
+    if (!(b.flags & CURRENCY_BLOCK_FLAG_POS_BLOCK))
       return false;
     return is_pos_block(b.miner_tx);
   }