diff --git a/bitcoin/src/blockdata/weight.rs b/bitcoin/src/blockdata/weight.rs
index e88e9f4f..03664111 100644
--- a/bitcoin/src/blockdata/weight.rs
+++ b/bitcoin/src/blockdata/weight.rs
@@ -40,6 +40,9 @@ impl Weight {
     /// Directly constructs `Weight` from weight units.
     pub const fn from_wu(wu: u64) -> Self { Weight(wu) }
 
+    /// Directly constructs `Weight` from usize weight units.
+    pub const fn from_wu_usize(wu: usize) -> Self { Weight(wu as u64) }
+
     /// Constructs `Weight` from kilo weight units returning `None` if an overflow occurred.
     pub fn from_kwu(wu: u64) -> Option<Self> { wu.checked_mul(1000).map(Weight) }
 
@@ -110,6 +113,7 @@ mod tests {
     #[test]
     fn weight_constructor_test() {
         assert_eq!(Weight::ZERO, Weight::from_wu(0));
+        assert_eq!(Weight::ZERO, Weight::from_wu_usize(0_usize));
     }
 
     #[test]