diff --git a/contracts/src/core/hash/Poseidon2.sol b/contracts/src/core/hash/Poseidon2.sol
index dd7ebac88..b43fd48f7 100644
--- a/contracts/src/core/hash/Poseidon2.sol
+++ b/contracts/src/core/hash/Poseidon2.sol
@@ -9,7 +9,7 @@ library Poseidon2T2 {
         return mulmod(mulmod(t, t, PRIME), x, PRIME);
     }
 
-    function compress(uint256[2] memory inputs) public pure returns (uint256) {
+    function compress(uint256[2] memory inputs) internal pure returns (uint256) {
         require(inputs[0] < PRIME && inputs[1] < PRIME, "Poseidon2T2: inputs must be in the field.");
         uint256 l = inputs[0];
         uint256 r = inputs[1];
diff --git a/contracts/src/core/hash/gen_poseidon2.py b/contracts/src/core/hash/gen_poseidon2.py
index e8b637803..972d77ae4 100644
--- a/contracts/src/core/hash/gen_poseidon2.py
+++ b/contracts/src/core/hash/gen_poseidon2.py
@@ -77,7 +77,7 @@ def generate():
     l += ["library Poseidon2T2 {"]
     l += ["    uint256 constant PRIME = 0x30644e72e131a029b85045b68181585d2833e84879b9709143e1f593f0000001;"]
     l += ["    function single_box(uint256 x) private pure returns (uint256) {uint256 t = mulmod(x, x, PRIME); return mulmod(mulmod(t, t, PRIME), x, PRIME);}"]
-    l += ["    function compress(uint256[2] memory inputs) public pure returns (uint256) {"]
+    l += ["    function compress(uint256[2] memory inputs) internal pure returns (uint256) {"]
     l += ["        require(inputs[0] < PRIME && inputs[1] < PRIME, \"Poseidon2T2: inputs must be in the field.\");"]
     l += ["        uint256 l = inputs[0]; uint256 r = inputs[1];"]