diff --git a/mbedtls/src/pk/mod.rs b/mbedtls/src/pk/mod.rs
index e87d60653..862c03d04 100644
--- a/mbedtls/src/pk/mod.rs
+++ b/mbedtls/src/pk/mod.rs
@@ -246,6 +246,8 @@ impl Pk {
         Ok(ret)
     }
 
+    /// This function now need a RNG because it utilized `EcPoint::mul` function which must need
+    /// a random number generator for blinding in mbedtls 3.X, 
     pub fn private_from_ec_components<F: Random>(rng: &mut F, mut curve: EcGroup, private_key: Mpi) -> Result<Pk> {
         let mut ret = Self::init();
         let curve_generator = curve.generator()?;