diff --git a/src/crypto/ecdsa/ecdsa.go b/src/crypto/ecdsa/ecdsa.go
index 72fb49934f..02848fd595 100644
--- a/src/crypto/ecdsa/ecdsa.go
+++ b/src/crypto/ecdsa/ecdsa.go
@@ -149,7 +149,7 @@ var errZeroParam = errors.New("zero parameter")
 // returns the signature as a pair of integers. The security of the private key
 // depends on the entropy of rand.
 func Sign(rand io.Reader, priv *PrivateKey, hash []byte) (r, s *big.Int, err error) {
-	// Get max(log2(q) / 2, 256) bits of entropy from rand.
+	// Get min(log2(q) / 2, 256) bits of entropy from rand.
 	entropylen := (priv.Curve.Params().BitSize + 7) / 16
 	if entropylen > 32 {
 		entropylen = 32