diff --git a/src/policy/fees/block_policy_estimator.cpp b/src/policy/fees/block_policy_estimator.cpp
index 23aecefea2a..2fdefc9aba2 100644
--- a/src/policy/fees/block_policy_estimator.cpp
+++ b/src/policy/fees/block_policy_estimator.cpp
@@ -423,7 +423,7 @@ void TxConfirmStats::Read(AutoFile& filein, size_t numBuckets)
     // Read data file and do some very basic sanity checking
     // buckets and bucketMap are not updated yet, so don't access them
     // If there is a read failure, we'll just discard this entire object anyway
-    size_t maxConfirms, maxPeriods;
+    uint64_t maxConfirms, maxPeriods;
 
     // The current version will store the decay with each individual TxConfirmStats and also keep a scale factor
     filein >> Using<EncodedDoubleFormatter>(decay);