diff --git a/evm/Cargo.toml b/evm/Cargo.toml
index 5ee3b1ff..24e5c661 100644
--- a/evm/Cargo.toml
+++ b/evm/Cargo.toml
@@ -22,6 +22,7 @@ pest = "2.1.3"
 pest_derive = "2.1.0"
 rand = "0.8.5"
 rand_chacha = "0.3.1"
+ripemd = "0.1.3"
 rlp = "0.5.1"
 serde = { version = "1.0.144", features = ["derive"] }
 sha2 = "0.10.2"
diff --git a/evm/src/cpu/kernel/asm/ripemd/main.asm b/evm/src/cpu/kernel/asm/ripemd/main.asm
index 66c409be..f9b28c94 100644
--- a/evm/src/cpu/kernel/asm/ripemd/main.asm
+++ b/evm/src/cpu/kernel/asm/ripemd/main.asm
@@ -82,7 +82,7 @@ global process:
     %reverse_bytes_u32
     OR 
     // stack: e' d' c' b' a', VARS
-    %stack (result, VARS: 3) -> (0xdeadbeef, result)
+    %stack (result, VARS: 3, retdest) -> (retdest, result)
     // stack: 0xdeadbeef, result
     JUMP
 
diff --git a/evm/src/cpu/kernel/tests/hash.rs b/evm/src/cpu/kernel/tests/hash.rs
index 3acdce2b..67ba64b2 100644
--- a/evm/src/cpu/kernel/tests/hash.rs
+++ b/evm/src/cpu/kernel/tests/hash.rs
@@ -3,7 +3,8 @@ use std::str::FromStr;
 use anyhow::Result;
 use ethereum_types::U256;
 use rand::{thread_rng, Rng};
-use sha2::{Digest, Sha256};
+use ripemd::{Digest, Ripemd160};
+use sha2::Sha256;
 
 use crate::cpu::kernel::aggregator::combined_kernel;
 use crate::cpu::kernel::interpreter::run_with_kernel;
@@ -15,6 +16,13 @@ fn sha2(input: Vec<u8>) -> U256 {
     U256::from(&hasher.finalize()[..])
 }
 
+/// Standard RipeMD implementation.
+fn ripemd(input: Vec<u8>) -> U256 {
+    let mut hasher = Ripemd160::new();
+    hasher.update(input);
+    U256::from(&hasher.finalize()[..])
+}
+
 fn test_hash(hash_fn_label: &str, standard_implementation: &dyn Fn(Vec<u8>) -> U256) -> Result<()> {
     let kernel = combined_kernel();
     let mut rng = thread_rng();
@@ -48,3 +56,8 @@ fn test_hash(hash_fn_label: &str, standard_implementation: &dyn Fn(Vec<u8>) -> U
 fn test_sha2() -> Result<()> {
     test_hash("sha2", &sha2)
 }
+
+#[test]
+fn test_ripemd() -> Result<()> {
+    test_hash("ripemd_stack", &ripemd)
+}
diff --git a/evm/src/cpu/kernel/tests/ripemd.rs b/evm/src/cpu/kernel/tests/ripemd.rs
index de8ebfb0..d0240cf2 100644
--- a/evm/src/cpu/kernel/tests/ripemd.rs
+++ b/evm/src/cpu/kernel/tests/ripemd.rs
@@ -1,21 +1,24 @@
 use anyhow::Result;
 use ethereum_types::U256;
+use itertools::Itertools;
 
 use crate::cpu::kernel::aggregator::combined_kernel;
 use crate::cpu::kernel::interpreter::run_with_kernel;
 
-fn make_input(word: &str) -> Vec<u8> {
-    let mut bytes: Vec<u8> = vec![word.len().try_into().unwrap()];
-    bytes.append(&mut word.as_bytes().to_vec());
-    bytes
+fn make_input(word: &str) -> Vec<u32> {
+    let mut input: Vec<u32> = vec![word.len().try_into().unwrap()];
+    input.append(&mut word.as_bytes().iter().map(|&x| x as u32).collect_vec());
+    input.push(u32::from_str_radix("deadbeef", 16).unwrap());
+    dbg!(input.clone());
+    input
 }
 
-#[test]
-fn test_ripemd() -> Result<()> {
+// #[test]
+fn test_ripemd_reference() -> Result<()> {
     let reference = vec![
-        ("", "0x9c1185a5c5e9fc54612808977ee8f548b2258d31"),
-        ("a", "0x0bdc9d2d256b3ee9daae347be6f4dc835a467ffe"),
-        ("abc", "0x8eb208f7e05d987a9b044a8e98c6b087f15a0bfc"),
+        // ("", "0x9c1185a5c5e9fc54612808977ee8f548b2258d31"),
+        // ("a", "0x0bdc9d2d256b3ee9daae347be6f4dc835a467ffe"),
+        // ("abc", "0x8eb208f7e05d987a9b044a8e98c6b087f15a0bfc"),
         (
             "message digest",
             "0x5d0689ef49d2fae572b881b123a85ffa21595f36",
@@ -39,7 +42,7 @@ fn test_ripemd() -> Result<()> {
     ];
 
     for (x, y) in reference {
-        let input: Vec<u8> = make_input(x);
+        let input: Vec<u32> = make_input(x);
         let expected = U256::from(y);
 
         let kernel = combined_kernel();