diff --git a/Cargo.toml b/Cargo.toml
index ca3f6a0..1cde154 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -97,7 +97,7 @@ latest_stable_rust = [
 # ALL FEATURES BELOW THIS ARE NOT SEMVER SUPPORTED! TEMPORARY ONLY!
 
 # Enable support for `std::simd` types.
-nightly_portable_simd = []
+nightly_portable_simd = ["rustversion"]
 # Enable support for unstable `std::arch` types (such as the AVX512 types).
 nightly_stdsimd = []
 # Enable `f16` and `f128`
@@ -108,6 +108,7 @@ nightly_docs = []
 
 [dependencies]
 bytemuck_derive = { version = "1.10.2", path = "derive", optional = true }
+rustversion = { version = "1.0.22", optional = true }
 
 [lints.rust]
 unexpected_cfgs = { level = "deny", check-cfg = [
diff --git a/src/pod.rs b/src/pod.rs
index 846f281..330f722 100644
--- a/src/pod.rs
+++ b/src/pod.rs
@@ -143,6 +143,7 @@ impl_unsafe_marker_for_simd!(
   }
 );
 
+#[rustversion::before(2026-01-27)] // See https://github.com/Lokathor/bytemuck/issues/343
 #[cfg(feature = "nightly_portable_simd")]
 #[cfg_attr(
   feature = "nightly_docs",
@@ -155,6 +156,18 @@ where
 {
 }
 
+#[rustversion::since(2026-01-27)] // See https://github.com/Lokathor/bytemuck/issues/343
+#[cfg(feature = "nightly_portable_simd")]
+#[cfg_attr(
+  feature = "nightly_docs",
+  doc(cfg(feature = "nightly_portable_simd"))
+)]
+unsafe impl<T, const N: usize> Pod for core::simd::Simd<T, N>
+where
+  T: core::simd::SimdElement + Pod,
+{
+}
+
 impl_unsafe_marker_for_simd!(
   #[cfg(all(target_arch = "x86", feature = "avx512_simd"))]
   unsafe impl Pod for x86::{
diff --git a/src/zeroable.rs b/src/zeroable.rs
index d88ba0f..186c567 100644
--- a/src/zeroable.rs
+++ b/src/zeroable.rs
@@ -222,6 +222,7 @@ impl_unsafe_marker_for_simd!(
     }
 );
 
+#[rustversion::before(2026-01-27)] // See https://github.com/Lokathor/bytemuck/issues/343
 #[cfg(feature = "nightly_portable_simd")]
 #[cfg_attr(
   feature = "nightly_docs",
@@ -234,6 +235,18 @@ where
 {
 }
 
+#[rustversion::since(2026-01-27)] // See https://github.com/Lokathor/bytemuck/issues/343
+#[cfg(feature = "nightly_portable_simd")]
+#[cfg_attr(
+  feature = "nightly_docs",
+  doc(cfg(feature = "nightly_portable_simd"))
+)]
+unsafe impl<T, const N: usize> Zeroable for core::simd::Simd<T, N>
+where
+  T: core::simd::SimdElement + Zeroable,
+{
+}
+
 impl_unsafe_marker_for_simd!(
   #[cfg(all(target_arch = "x86", feature = "avx512_simd"))]
   unsafe impl Zeroable for x86::{