diff --git a/src/rpc/core_rpc_server.cpp b/src/rpc/core_rpc_server.cpp
index 1ce7c2b89..63f2b7e53 100644
--- a/src/rpc/core_rpc_server.cpp
+++ b/src/rpc/core_rpc_server.cpp
@@ -204,7 +204,7 @@ namespace cryptonote
       }
       catch (...)
       {
-        res.status = "Error retrieving block at height " + height;
+        res.status = "Error retrieving block at height " + std::to_string(height);
         return true;
       }
       std::list<transaction> txs;
diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index 2e4550879..9fd98056a 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -5417,9 +5417,9 @@ uint64_t wallet2::get_blockchain_height_by_date(uint16_t year, uint8_t month, ui
       throw std::runtime_error(oss.str());
     }
     cryptonote::block blk_min, blk_mid, blk_max;
-    if (!parse_and_validate_block_from_blob(res.blocks[0].block, blk_min)) throw std::runtime_error("failed to parse blob at height " + height_min);
-    if (!parse_and_validate_block_from_blob(res.blocks[1].block, blk_mid)) throw std::runtime_error("failed to parse blob at height " + height_mid);
-    if (!parse_and_validate_block_from_blob(res.blocks[2].block, blk_max)) throw std::runtime_error("failed to parse blob at height " + height_max);
+    if (!parse_and_validate_block_from_blob(res.blocks[0].block, blk_min)) throw std::runtime_error("failed to parse blob at height " + std::to_string(height_min));
+    if (!parse_and_validate_block_from_blob(res.blocks[1].block, blk_mid)) throw std::runtime_error("failed to parse blob at height " + std::to_string(height_mid));
+    if (!parse_and_validate_block_from_blob(res.blocks[2].block, blk_max)) throw std::runtime_error("failed to parse blob at height " + std::to_string(height_max));
     uint64_t timestamp_min = blk_min.timestamp;
     uint64_t timestamp_mid = blk_mid.timestamp;
     uint64_t timestamp_max = blk_max.timestamp;