diff --git a/src/miner.h b/src/miner.h
index 683f4fe08..db165e71c 100644
--- a/src/miner.h
+++ b/src/miner.h
@@ -158,7 +158,6 @@ public:
     struct Options {
         Options();
         size_t nBlockMaxWeight;
-        size_t nBlockMaxSize;
         CFeeRate blockMinFeeRate;
     };
 
diff --git a/src/test/miner_tests.cpp b/src/test/miner_tests.cpp
index 9fa9a8509..41e0626eb 100644
--- a/src/test/miner_tests.cpp
+++ b/src/test/miner_tests.cpp
@@ -32,7 +32,6 @@ static BlockAssembler AssemblerForTest(const CChainParams& params) {
     BlockAssembler::Options options;
 
     options.nBlockMaxWeight = MAX_BLOCK_WEIGHT;
-    options.nBlockMaxSize = MAX_BLOCK_SERIALIZED_SIZE;
     options.blockMinFeeRate = blockMinFeeRate;
     return BlockAssembler(params, options);
 }