diff --git a/tests/waku_rln_relay/test_waku_rln_relay.nim b/tests/waku_rln_relay/test_waku_rln_relay.nim
index d09764ca2..020939d9e 100644
--- a/tests/waku_rln_relay/test_waku_rln_relay.nim
+++ b/tests/waku_rln_relay/test_waku_rln_relay.nim
@@ -837,26 +837,19 @@ suite "Waku rln relay":
       msgValidate2 == MessageValidationResult.Valid
 
   test "toIDCommitment and toUInt256":
-    # create an instance of rln
-    let rlnInstance = createRLNInstanceWrapper()
-    require:
-      rlnInstance.isOk()
-
-    let rln = rlnInstance.get()
-
-    # create an idendity credential
     let idCredentialRes = rln.membershipKeyGen()
     require:
       idCredentialRes.isOk()
 
     let idCredential = idCredentialRes.get()
 
-    # convert the idCommitment to UInt256
+    # convert the idCommitment to UInt256 (now using big-endian)
     let idCUInt = idCredential.idCommitment.toUInt256()
     # convert the UInt256 back to ICommitment
     let idCommitment = toIDCommitment(idCUInt)
 
     # check that the conversion has not distorted the original value
+    # This test now expects big-endian round-trip
     check:
       idCredential.idCommitment == idCommitment
 
diff --git a/waku/waku_keystore/protocol_types.nim b/waku/waku_keystore/protocol_types.nim
index 6cfc2f183..96c19f50e 100644
--- a/waku/waku_keystore/protocol_types.nim
+++ b/waku/waku_keystore/protocol_types.nim
@@ -26,7 +26,7 @@ type IdentityCredential* = object
   idCommitment*: IDCommitment
 
 proc toUInt256*(idCommitment: IDCommitment): UInt256 =
-  let pk = UInt256.fromBytesLE(idCommitment)
+  let pk = UInt256.fromBytesBE(idCommitment)
   return pk
 
 proc toIDCommitment*(idCommitmentUint: UInt256): IDCommitment =