diff --git a/evm/src/cpu/kernel/interpreter.rs b/evm/src/cpu/kernel/interpreter.rs
index 5c2329e5..89a4341d 100644
--- a/evm/src/cpu/kernel/interpreter.rs
+++ b/evm/src/cpu/kernel/interpreter.rs
@@ -370,6 +370,9 @@ impl<'a> Interpreter<'a> {
         self.push(x.overflowing_sub(y).0);
     }
 
+// TODO: 107 is hardcoded as a dummy prime for testing
+// should be changed to the proper implementation prime
+
     fn run_addfp254(&mut self) {
         let x = self.pop();
         let y = self.pop();
diff --git a/evm/src/cpu/kernel/tests/fields.rs b/evm/src/cpu/kernel/tests/fields.rs
index bb57cb2a..0a490983 100644
--- a/evm/src/cpu/kernel/tests/fields.rs
+++ b/evm/src/cpu/kernel/tests/fields.rs
@@ -5,6 +5,9 @@ use rand::{thread_rng, Rng};
 use crate::cpu::kernel::aggregator::combined_kernel;
 use crate::cpu::kernel::interpreter::run_with_kernel;
 
+// TODO: 107 is hardcoded as a dummy prime for testing
+// should be changed to the proper implementation prime
+// once the run_{add, mul, sub}fp254 fns are implemented
 const P254: u32 = 107;
 
 fn add_fp(x: u32, y: u32) -> u32 {