diff --git a/src/rpc/server.h b/src/rpc/server.h
index 10d4a94f4..1cbcf2e21 100644
--- a/src/rpc/server.h
+++ b/src/rpc/server.h
@@ -66,7 +66,7 @@ void SetRPCWarmupStatus(const std::string& newStatus);
 void SetRPCWarmupFinished();
 
 /* returns the current warmup state.  */
-bool RPCIsInWarmup(std::string *statusOut);
+bool RPCIsInWarmup(std::string *outStatus);
 
 /**
  * Type-check arguments; throws JSONRPCError if wrong type given. Does not check that
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index 4cfcc21d3..de9c9bdb3 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -111,7 +111,7 @@ void CTxMemPool::UpdateForDescendants(txiter updateIt, cacheMap &cachedDescendan
 
 // vHashesToUpdate is the set of transaction hashes from a disconnected block
 // which has been re-added to the mempool.
-// for each entry, look for descendants that are outside hashesToUpdate, and
+// for each entry, look for descendants that are outside vHashesToUpdate, and
 // add fee/size information for such descendants to the parent.
 // for each such descendant, also update the ancestor state to include the parent.
 void CTxMemPool::UpdateTransactionsFromBlock(const std::vector<uint256> &vHashesToUpdate)
diff --git a/src/txmempool.h b/src/txmempool.h
index bceffd195..3efd35757 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -604,12 +604,12 @@ public:
      *  new mempool entries may have children in the mempool (which is generally
      *  not the case when otherwise adding transactions).
      *  UpdateTransactionsFromBlock() will find child transactions and update the
-     *  descendant state for each transaction in hashesToUpdate (excluding any
-     *  child transactions present in hashesToUpdate, which are already accounted
-     *  for).  Note: hashesToUpdate should be the set of transactions from the
+     *  descendant state for each transaction in vHashesToUpdate (excluding any
+     *  child transactions present in vHashesToUpdate, which are already accounted
+     *  for).  Note: vHashesToUpdate should be the set of transactions from the
      *  disconnected block that have been accepted back into the mempool.
      */
-    void UpdateTransactionsFromBlock(const std::vector<uint256> &hashesToUpdate);
+    void UpdateTransactionsFromBlock(const std::vector<uint256> &vHashesToUpdate);
 
     /** Try to calculate all in-mempool ancestors of entry.
      *  (these are all calculated including the tx itself)
diff --git a/src/validation.h b/src/validation.h
index 6be85f4ae..3f7aca5fc 100644
--- a/src/validation.h
+++ b/src/validation.h
@@ -327,7 +327,7 @@ void FlushStateToDisk();
 /** Prune block files and flush state to disk. */
 void PruneAndFlush();
 /** Prune block files up to a given height */
-void PruneBlockFilesManual(int nPruneUpToHeight);
+void PruneBlockFilesManual(int nManualPruneHeight);
 
 /** (try to) add transaction to memory pool */
 bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransactionRef &tx, bool fLimitFree,