diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index 3ad395e2fe09..21a8655594a5 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -5287,6 +5287,7 @@ nzint_impl_from! { NonZeroU8, NonZeroUsize, #[unstable(feature = "nz_int_conv",
 nzint_impl_from! { NonZeroU16, NonZeroU32, #[unstable(feature = "nz_int_conv", issue = "66196")] }
 nzint_impl_from! { NonZeroU16, NonZeroU64, #[unstable(feature = "nz_int_conv", issue = "66196")] }
 nzint_impl_from! { NonZeroU16, NonZeroU128, #[unstable(feature = "nz_int_conv", issue = "66196")] }
+nzint_impl_from! { NonZeroU16, NonZeroUsize, #[unstable(feature = "nz_int_conv", issue = "66196")] }
 nzint_impl_from! { NonZeroU32, NonZeroU64, #[unstable(feature = "nz_int_conv", issue = "66196")] }
 nzint_impl_from! { NonZeroU32, NonZeroU128, #[unstable(feature = "nz_int_conv", issue = "66196")] }
 nzint_impl_from! { NonZeroU64, NonZeroU128, #[unstable(feature = "nz_int_conv", issue = "66196")] }
@@ -5300,6 +5301,7 @@ nzint_impl_from! { NonZeroI8, NonZeroIsize, #[unstable(feature = "nz_int_conv",
 nzint_impl_from! { NonZeroI16, NonZeroI32, #[unstable(feature = "nz_int_conv", issue = "66196")] }
 nzint_impl_from! { NonZeroI16, NonZeroI64, #[unstable(feature = "nz_int_conv", issue = "66196")] }
 nzint_impl_from! { NonZeroI16, NonZeroI128, #[unstable(feature = "nz_int_conv", issue = "66196")] }
+nzint_impl_from! { NonZeroI16, NonZeroIsize, #[unstable(feature = "nz_int_conv", issue = "66196")] }
 nzint_impl_from! { NonZeroI32, NonZeroI64, #[unstable(feature = "nz_int_conv", issue = "66196")] }
 nzint_impl_from! { NonZeroI32, NonZeroI128, #[unstable(feature = "nz_int_conv", issue = "66196")] }
 nzint_impl_from! { NonZeroI64, NonZeroI128, #[unstable(feature = "nz_int_conv", issue = "66196")] }