1 files changed, 6 insertions, 1 deletions
diff --git a/src/policy/feerate.h b/src/policy/feerate.h
index 7e519e3efa..3449cdd699 100644
--- a/src/policy/feerate.h
+++ b/src/policy/feerate.h
@@ -20,10 +20,15 @@ class CFeeRate
 {
 private:
     CAmount nSatoshisPerK; // unit is satoshis-per-1,000-bytes
+
 public:
     /** Fee rate of 0 satoshis per kB */
     CFeeRate() : nSatoshisPerK(0) { }
-    explicit CFeeRate(const CAmount& _nSatoshisPerK): nSatoshisPerK(_nSatoshisPerK) { }
+    template<typename I>
+    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. The size in bytes must not exceed (2^63 - 1)*/
     CFeeRate(const CAmount& nFeePaid, size_t nBytes);
     /**