diff --git a/evm_arithmetization/Cargo.toml b/evm_arithmetization/Cargo.toml
index 45e9ccb8f..7398aee08 100644
--- a/evm_arithmetization/Cargo.toml
+++ b/evm_arithmetization/Cargo.toml
@@ -61,6 +61,7 @@ parallel = [
   "plonky2_maybe_rayon/parallel",
   "starky/parallel",
 ]
+polygon_pos = []
 
 [[bin]]
 name = "assemble"
diff --git a/evm_arithmetization/src/cpu/kernel/constants/mod.rs b/evm_arithmetization/src/cpu/kernel/constants/mod.rs
index 3bd99f610..65d6418b3 100644
--- a/evm_arithmetization/src/cpu/kernel/constants/mod.rs
+++ b/evm_arithmetization/src/cpu/kernel/constants/mod.rs
@@ -337,7 +337,10 @@ const PRECOMPILES_GAS: [(&str, u16); 14] = [
 const SNARKV_POINTERS: [(&str, u64); 2] = [("SNARKV_INP", 112), ("SNARKV_OUT", 100)];
 
 const CODE_SIZE_LIMIT: [(&str, u64); 3] = [
-    ("MAX_CODE_SIZE", 0x6000),
+    #[cfg(not(feature = "polygon_pos"))]
+    ("MAX_CODE_SIZE", 0x6000), // default Ethereum value
+    #[cfg(feature = "polygon_pos")]
+    ("MAX_CODE_SIZE", 0x8000), // Polygon PoS value, see PIP-30.
     ("MAX_INITCODE_SIZE", 0xc000),
     ("INITCODE_WORD_COST", 2),
 ];