diff --git a/src/rpc/core_rpc_server.cpp b/src/rpc/core_rpc_server.cpp
index 0fb7e12d2..0077ec8b9 100644
--- a/src/rpc/core_rpc_server.cpp
+++ b/src/rpc/core_rpc_server.cpp
@@ -614,7 +614,7 @@ namespace cryptonote
         : COMMAND_RPC_GET_BLOCKS_FAST::FULL;
     }
 
-    if (req.init_tree_sync)
+    if (req.init_tree_sync && res.init_tree_sync_data.init_block_hash == crypto::null_hash)
     {
       // Get the first hash in the result
       if (res.blocks.empty())