diff --git a/src/policy/feerate.h b/src/policy/feerate.h
index df700dfed5..e52d29454f 100644
--- a/src/policy/feerate.h
+++ b/src/policy/feerate.h
@@ -24,34 +24,38 @@ enum class FeeEstimateMode {
 };
 
 /**
- * Fee rate in satoshis per kilobyte: CAmount / kB
+ * Fee rate in satoshis per kilovirtualbyte: CAmount / kvB
  */
 class CFeeRate
 {
 private:
-    CAmount nSatoshisPerK; // unit is satoshis-per-1,000-bytes
+    /** Fee rate in sat/kvB (satoshis per 1000 virtualbytes) */
+    CAmount nSatoshisPerK;
 
 public:
-    /** Fee rate of 0 satoshis per kB */
+    /** Fee rate of 0 satoshis per kvB */
     CFeeRate() : nSatoshisPerK(0) { }
     template<typename I>
     explicit CFeeRate(const I _nSatoshisPerK): nSatoshisPerK(_nSatoshisPerK) {
         // We've previously had bugs creep in from silent double->int conversion...
         static_assert(std::is_integral<I>::value, "CFeeRate should be used without floats");
     }
-    /** Constructor for a fee rate in satoshis per kB (duff/kB).
+
+    /**
+     * Construct a fee rate from a fee in satoshis and a vsize in vB.
      *
-     *  Passing a num_bytes value of COIN (1e8) returns a fee rate in satoshis per B (sat/B),
-     *  e.g. (nFeePaid * 1e8 / 1e3) == (nFeePaid / 1e5),
-     *  where 1e5 is the ratio to convert from DASH/kB to sat/B.
+     * param@[in]   nFeePaid    The fee paid by a transaction, in satoshis
+     * param@[in]   num_bytes   The vsize of a transaction, in vbytes.
      */
     CFeeRate(const CAmount& nFeePaid, uint32_t num_bytes);
+
     /**
-     * Return the fee in satoshis for the given size in bytes.
+     * Return the fee in satoshis for the given size in vbytes.
      */
     CAmount GetFee(uint32_t num_bytes) const;
+
     /**
-     * Return the fee in satoshis for a size of 1000 bytes
+     * Return the fee in satoshis for a vsize of 1000 vbytes
      */
     CAmount GetFeePerK() const { return nSatoshisPerK; }
     friend bool operator<(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK < b.nSatoshisPerK; }