diff --git a/src/rpc/core_rpc_server.cpp b/src/rpc/core_rpc_server.cpp
index d9d851d47..22cb43125 100644
--- a/src/rpc/core_rpc_server.cpp
+++ b/src/rpc/core_rpc_server.cpp
@@ -2115,7 +2115,8 @@ namespace cryptonote
     // Fixing of high orphan issue for most pools
     // Thanks Boolberry!
     block b;
-    if(!parse_and_validate_block_from_blob(blockblob, b))
+    crypto::hash blk_id;
+    if(!parse_and_validate_block_from_blob(blockblob, b, blk_id))
     {
       error_resp.code = CORE_RPC_ERROR_CODE_WRONG_BLOCKBLOB;
       error_resp.message = "Wrong block blob";
@@ -2138,6 +2139,7 @@ namespace cryptonote
       error_resp.message = "Block not accepted";
       return false;
     }
+    res.block_id = epee::string_tools::pod_to_hex(blk_id);
     res.status = CORE_RPC_STATUS_OK;
     return true;
   }
diff --git a/src/rpc/core_rpc_server_commands_defs.h b/src/rpc/core_rpc_server_commands_defs.h
index c1285d300..b69c244fc 100644
--- a/src/rpc/core_rpc_server_commands_defs.h
+++ b/src/rpc/core_rpc_server_commands_defs.h
@@ -88,7 +88,7 @@ namespace cryptonote
 // advance which version they will stop working with
 // Don't go over 32767 for any of these
 #define CORE_RPC_VERSION_MAJOR 3
-#define CORE_RPC_VERSION_MINOR 12
+#define CORE_RPC_VERSION_MINOR 13
 #define MAKE_CORE_RPC_VERSION(major,minor) (((major)<<16)|(minor))
 #define CORE_RPC_VERSION MAKE_CORE_RPC_VERSION(CORE_RPC_VERSION_MAJOR, CORE_RPC_VERSION_MINOR)
 
@@ -1068,8 +1068,11 @@ namespace cryptonote
     
     struct response_t: public rpc_response_base
     {
+      std::string block_id;
+
       BEGIN_KV_SERIALIZE_MAP()
         KV_SERIALIZE_PARENT(rpc_response_base)
+        KV_SERIALIZE(block_id)
       END_KV_SERIALIZE_MAP()
     };
     typedef epee::misc_utils::struct_init<response_t> response;
diff --git a/tests/functional_tests/mining.py b/tests/functional_tests/mining.py
index f1aa15c14..f1e0978fb 100755
--- a/tests/functional_tests/mining.py
+++ b/tests/functional_tests/mining.py
@@ -36,6 +36,7 @@ import math
 import monotonic
 import util_resources
 import multiprocessing
+import string
 
 """Test daemon mining RPC calls
 
@@ -52,6 +53,11 @@ Control the behavior with these environment variables:
 from framework.daemon import Daemon
 from framework.wallet import Wallet
 
+def assert_non_null_hash(s):
+    assert len(s) == 64 # correct length
+    assert all((c in string.hexdigits for c in s)) # is parseable as hex
+    assert s != ('0' * 64) # isn't null hash
+
 class MiningTest():
     def run_test(self):
         self.reset()
@@ -250,6 +256,8 @@ class MiningTest():
             block_hash = hashes[i]
             assert len(block_hash) == 64
             res = daemon.submitblock(blocks[i])
+            submitted_block_id = res.block_id
+            assert_non_null_hash(submitted_block_id)
             res = daemon.get_height()
             assert res.height == height + i + 1
             assert res.hash == block_hash
@@ -346,6 +354,8 @@ class MiningTest():
         t0 = time.time()
         for h in range(len(block_hashes)):
             res = daemon.submitblock(blocks[h])
+            submitted_block_id = res.block_id
+            assert_non_null_hash(submitted_block_id)
         t0 = time.time() - t0
         res = daemon.get_info()
         assert height == res.height