diff --git a/Cargo.toml b/Cargo.toml
index 40ea48204eb..9284f3084fd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -61,8 +61,8 @@ serde = { version = "1.0.103", features = ["derive"], optional = true }
 
 [dependencies.packed_simd]
 # NOTE: so far no version works reliably due to dependence on unstable features
-version = "0.3"
-# git = "https://github.com/rust-lang-nursery/packed_simd"
+package = "packed_simd_2"
+version = "0.3.4"
 optional = true
 features = ["into_bits"]
 
diff --git a/src/distributions/integer.rs b/src/distributions/integer.rs
index 13ed113b00d..8a2ce4cf1e6 100644
--- a/src/distributions/integer.rs
+++ b/src/distributions/integer.rs
@@ -11,9 +11,9 @@
 use crate::distributions::{Distribution, Standard};
 use crate::Rng;
 #[cfg(all(target_arch = "x86", feature = "simd_support"))]
-use core::arch::x86::{__m64, __m128i, __m256i};
+use core::arch::x86::{__m128i, __m256i};
 #[cfg(all(target_arch = "x86_64", feature = "simd_support"))]
-use core::arch::x86_64::{__m64, __m128i, __m256i};
+use core::arch::x86_64::{__m128i, __m256i};
 #[cfg(not(target_os = "emscripten"))] use core::num::NonZeroU128;
 use core::num::{NonZeroU16, NonZeroU32, NonZeroU64, NonZeroU8, NonZeroUsize};
 #[cfg(feature = "simd_support")] use packed_simd::*;
@@ -158,7 +158,7 @@ simd_impl!(512, u8x64, i8x64, u16x32, i16x32, u32x16, i32x16, u64x8, i64x8,);
     feature = "simd_support",
     any(target_arch = "x86", target_arch = "x86_64")
 ))]
-simd_impl!((__m64, u8x8), (__m128i, u8x16), (__m256i, u8x32),);
+simd_impl!((__m128i, u8x16), (__m256i, u8x32),);
 
 #[cfg(test)]
 mod tests {
diff --git a/src/distributions/utils.rs b/src/distributions/utils.rs
index f965bbcb4fd..e3bceb8a96c 100644
--- a/src/distributions/utils.rs
+++ b/src/distributions/utils.rs
@@ -159,9 +159,8 @@ mod simd_wmul {
     }
 
     wmul_impl! { (u16x2, u32x2),, 16 }
-    #[cfg(not(target_feature = "sse2"))]
     wmul_impl! { (u16x4, u32x4),, 16 }
-    #[cfg(not(target_feature = "sse4.2"))]
+    #[cfg(not(target_feature = "sse2"))]
     wmul_impl! { (u16x8, u32x8),, 16 }
     #[cfg(not(target_feature = "avx2"))]
     wmul_impl! { (u16x16, u32x16),, 16 }
@@ -187,8 +186,6 @@ mod simd_wmul {
     }
 
     #[cfg(target_feature = "sse2")]
-    wmul_impl_16! { u16x4, __m64, _mm_mulhi_pu16, _mm_mullo_pi16 }
-    #[cfg(target_feature = "sse4.2")]
     wmul_impl_16! { u16x8, __m128i, _mm_mulhi_epu16, _mm_mullo_epi16 }
     #[cfg(target_feature = "avx2")]
     wmul_impl_16! { u16x16, __m256i, _mm256_mulhi_epu16, _mm256_mullo_epi16 }