diff --git a/rand_core/Cargo.toml b/rand_core/Cargo.toml
index 8c9d902a70..633b49bc18 100644
--- a/rand_core/Cargo.toml
+++ b/rand_core/Cargo.toml
@@ -33,3 +33,4 @@ serde1 = ["serde"] # enables serde for BlockRng wrapper
 serde = { version = "1", features = ["derive"], optional = true }
 getrandom = { version = "0.2", optional = true }
 zerocopy = { version = "0.7.20", default-features = false }
+zeroize = { version = "1.7", optional = true }
\ No newline at end of file
diff --git a/rand_core/src/block.rs b/rand_core/src/block.rs
index a8cefc8e40..be1ab512bd 100644
--- a/rand_core/src/block.rs
+++ b/rand_core/src/block.rs
@@ -59,6 +59,8 @@ use core::convert::AsRef;
 use core::fmt;
 #[cfg(feature = "serde1")]
 use serde::{Deserialize, Serialize};
+#[cfg(feature = "zeroize")]
+use zeroize::{DefaultIsZeroes, Zeroize};
 
 /// A trait for RNGs which do not generate random numbers individually, but in
 /// blocks (typically `[u32; N]`). This technique is commonly used by
@@ -67,7 +69,11 @@ use serde::{Deserialize, Serialize};
 /// See the [module][crate::block] documentation for details.
 pub trait BlockRngCore {
     /// Results element type, e.g. `u32`.
+    #[cfg(not(feature = "zeroize"))]
     type Item;
+    /// Results element type, e.g. `u32`.
+    #[cfg(feature = "zeroize")]
+    type Item: DefaultIsZeroes;
 
     /// Results type. This is the 'block' an RNG implementing `BlockRngCore`
     /// generates, which will usually be an array like `[u32; 16]`.
@@ -262,6 +268,14 @@ impl<R: BlockRngCore + SeedableRng> SeedableRng for BlockRng<R> {
     }
 }
 
+#[cfg(feature = "zeroize")]
+#[cfg_attr(docsrs, doc(cfg(feature = "zeroize")))]
+impl<R: BlockRngCore> Zeroize for BlockRng<R> {
+    fn zeroize(&mut self) {
+        self.results.as_mut().zeroize()
+    }
+}
+
 impl<R: CryptoBlockRng + BlockRngCore<Item = u32>> CryptoRng for BlockRng<R> {}
 
 /// A wrapper type implementing [`RngCore`] for some type implementing
@@ -430,6 +444,14 @@ impl<R: BlockRngCore + SeedableRng> SeedableRng for BlockRng64<R> {
     }
 }
 
+#[cfg(feature = "zeroize")]
+#[cfg_attr(docsrs, doc(cfg(feature = "zeroize")))]
+impl<R: BlockRngCore> Zeroize for BlockRng64<R> {
+    fn zeroize(&mut self) {
+        self.results.as_mut().zeroize()
+    }
+}
+
 impl<R: CryptoBlockRng + BlockRngCore<Item = u64>> CryptoRng for BlockRng64<R> {}
 
 #[cfg(test)]