diff --git a/src/rpcmining.cpp b/src/rpcmining.cpp
index a6494163a..28076607b 100644
--- a/src/rpcmining.cpp
+++ b/src/rpcmining.cpp
@@ -589,7 +589,7 @@ Value submitblock(const Array& params, bool fHelp)
     if (state.IsError())
     {
         std::string strRejectReason = state.GetRejectReason();
-        throw JSONRPCError(RPC_MISC_ERROR, strRejectReason);
+        throw JSONRPCError(RPC_VERIFY_ERROR, strRejectReason);
     }
     if (state.IsInvalid())
         return "rejected"; // TODO: report validation state
diff --git a/src/rpcprotocol.h b/src/rpcprotocol.h
index a9adb5880..911724850 100644
--- a/src/rpcprotocol.h
+++ b/src/rpcprotocol.h
@@ -49,9 +49,14 @@ enum RPCErrorCode
     RPC_INVALID_PARAMETER           = -8,  // Invalid, missing or duplicate parameter
     RPC_DATABASE_ERROR              = -20, // Database error
     RPC_DESERIALIZATION_ERROR       = -22, // Error parsing or validating structure in raw format
-    RPC_TRANSACTION_ERROR           = -25, // General error during transaction submission
-    RPC_TRANSACTION_REJECTED        = -26, // Transaction was rejected by network rules
-    RPC_TRANSACTION_ALREADY_IN_CHAIN= -27, // Transaction already in chain
+    RPC_VERIFY_ERROR                = -25, // General error during transaction or block submission
+    RPC_VERIFY_REJECTED             = -26, // Transaction or block was rejected by network rules
+    RPC_VERIFY_ALREADY_IN_CHAIN     = -27, // Transaction already in chain
+
+    // Aliases for backward compatibility
+    RPC_TRANSACTION_ERROR           = RPC_VERIFY_ERROR,
+    RPC_TRANSACTION_REJECTED        = RPC_VERIFY_REJECTED,
+    RPC_TRANSACTION_ALREADY_IN_CHAIN= RPC_VERIFY_ALREADY_IN_CHAIN,
 
     // P2P client errors
     RPC_CLIENT_NOT_CONNECTED        = -9,  // Bitcoin is not connected