diff --git a/evm/src/cpu/kernel/interpreter.rs b/evm/src/cpu/kernel/interpreter.rs
index d1ab20fb..7fc0b0d6 100644
--- a/evm/src/cpu/kernel/interpreter.rs
+++ b/evm/src/cpu/kernel/interpreter.rs
@@ -351,7 +351,7 @@ impl<'a> Interpreter<'a> {
             0x41 => todo!(),                                            // "COINBASE",
             0x42 => self.run_timestamp(),                               // "TIMESTAMP",
             0x43 => self.run_number(),                                  // "NUMBER",
-            0x44 => todo!(),                                            // "DIFFICULTY",
+            0x44 => self.run_difficulty(),                              // "DIFFICULTY",
             0x45 => todo!(),                                            // "GASLIMIT",
             0x46 => todo!(),                                            // "CHAINID",
             0x48 => todo!(),                                            // "BASEFEE",
@@ -667,6 +667,10 @@ impl<'a> Interpreter<'a> {
         self.push(self.get_global_metadata_field(GlobalMetadata::BlockNumber))
     }
 
+    fn run_difficulty(&mut self) {
+        self.push(self.get_global_metadata_field(GlobalMetadata::BlockDifficulty))
+    }
+
     fn run_prover_input(&mut self) -> anyhow::Result<()> {
         let prover_input_fn = self
             .prover_inputs_map