diff --git a/Cargo.toml b/Cargo.toml
index 6eb7361b6..7b70857c1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -63,4 +63,4 @@ alloc = ["zeroize/alloc"]
 # fiat-crypto backend with formally-verified field arithmetic
 fiat_backend = ["fiat-crypto"]
 # The SIMD backend uses parallel formulas, using either AVX2 or AVX512-IFMA.
-simd_backend = ["nightly", "packed_simd"]
+simd_backend = ["alloc", "nightly", "packed_simd"]
diff --git a/src/lib.rs b/src/lib.rs
index e0067dc9e..52d1a1c50 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -27,7 +27,8 @@
 // External dependencies:
 //------------------------------------------------------------------------
 
-#[cfg(all(feature = "alloc", not(feature = "std")))]
+#[cfg(feature = "alloc")]
+#[allow(unused_imports)]
 #[macro_use]
 extern crate alloc;
 
diff --git a/src/montgomery.rs b/src/montgomery.rs
index 7e8e0df48..53c76fb14 100644
--- a/src/montgomery.rs
+++ b/src/montgomery.rs
@@ -470,9 +470,9 @@ mod test {
     ];
 
     #[test]
-    #[cfg(feature = "std")] // Vec
+    #[cfg(feature = "alloc")] // Vec
     fn montgomery_elligator_correct() {
-        let bytes: std::vec::Vec<u8> = (0u8..32u8).collect();
+        let bytes: alloc::vec::Vec<u8> = (0u8..32u8).collect();
         let bits_in: [u8; 32] = (&bytes[..]).try_into().expect("Range invariant broken");
 
         let fe = FieldElement::from_bytes(&bits_in);