diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9b3115b..5a147c4 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -135,7 +135,7 @@ jobs:
     name: "Miri tests"
     runs-on: ubuntu-latest
     env:
-      MIRIFLAGS: "-Zmiri-disable-isolation -Zmiri-strict-provenance -Zmiri-tag-raw-pointers"
+      MIRIFLAGS: "-Zmiri-disable-isolation -Zmiri-strict-provenance"
     steps:
     - uses: actions/checkout@v1
     - run: rustup toolchain install nightly --profile minimal --component rust-src miri
diff --git a/src/lib.rs b/src/lib.rs
index 9e85882..b76e7d1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,7 +1,4 @@
-#![cfg_attr(
-    feature = "alloc_ref",
-    feature(allocator_api, alloc_layout_extra, nonnull_slice_from_raw_parts)
-)]
+#![cfg_attr(feature = "alloc_ref", feature(allocator_api, alloc_layout_extra))]
 #![no_std]
 
 #[cfg(any(test, fuzzing))]