diff --git a/src/distributions/utils.rs b/src/distributions/utils.rs
index 3af4e86fdec..f7ddecbb9cd 100644
--- a/src/distributions/utils.rs
+++ b/src/distributions/utils.rs
@@ -321,6 +321,7 @@ macro_rules! scalar_float_impl {
                 <$ty>::from_bits(self.to_bits() - 1)
             }
             type UInt = $uty;
+            #[inline]
             fn cast_from_int(i: Self::UInt) -> Self { i as $ty }
         }