diff --git a/src/validation.cpp b/src/validation.cpp
index 23ed280c9a..c7fa6abd08 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -585,13 +585,13 @@ private:
 
     // Run the script checks using our policy flags. As this can be slow, we should
     // only invoke this on transactions that have otherwise passed policy checks.
-    bool PolicyScriptChecks(ATMPArgs& args, Workspace& ws, PrecomputedTransactionData& txdata) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
+    bool PolicyScriptChecks(ATMPArgs& args, const Workspace& ws, PrecomputedTransactionData& txdata) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
 
     // Re-run the script checks, using consensus flags, and try to cache the
     // result in the scriptcache. This should be done after
     // PolicyScriptChecks(). This requires that all inputs either be in our
     // utxo set or in the mempool.
-    bool ConsensusScriptChecks(ATMPArgs& args, Workspace& ws, PrecomputedTransactionData &txdata) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
+    bool ConsensusScriptChecks(ATMPArgs& args, const Workspace& ws, PrecomputedTransactionData &txdata) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
 
     // Try to add the transaction to the mempool, removing any conflicts first.
     // Returns true if the transaction is in the mempool after any size
@@ -843,7 +843,7 @@ bool MemPoolAccept::PreChecks(ATMPArgs& args, Workspace& ws)
     return true;
 }
 
-bool MemPoolAccept::PolicyScriptChecks(ATMPArgs& args, Workspace& ws, PrecomputedTransactionData& txdata)
+bool MemPoolAccept::PolicyScriptChecks(ATMPArgs& args, const Workspace& ws, PrecomputedTransactionData& txdata)
 {
     const CTransaction& tx = *ws.m_ptx;
 
@@ -860,7 +860,7 @@ bool MemPoolAccept::PolicyScriptChecks(ATMPArgs& args, Workspace& ws, Precompute
     return true;
 }
 
-bool MemPoolAccept::ConsensusScriptChecks(ATMPArgs& args, Workspace& ws, PrecomputedTransactionData& txdata)
+bool MemPoolAccept::ConsensusScriptChecks(ATMPArgs& args, const Workspace& ws, PrecomputedTransactionData& txdata)
 {
     const CTransaction& tx = *ws.m_ptx;
     const uint256& hash = ws.m_hash;