diff --git a/crypto/signature_cgo.go b/crypto/signature_cgo.go
index d06b53a5e0..381d8a1bbc 100644
--- a/crypto/signature_cgo.go
+++ b/crypto/signature_cgo.go
@@ -27,7 +27,7 @@ import (
 	"github.com/ethereum/go-ethereum/crypto/secp256k1"
 )
 
-// Ecrecover returns the public key that created the given signature.
+// Ecrecover returns the uncompressed public key that created the given signature.
 func Ecrecover(hash, sig []byte) ([]byte, error) {
 	return secp256k1.RecoverPubkey(hash, sig)
 }
@@ -61,7 +61,7 @@ func Sign(hash []byte, prv *ecdsa.PrivateKey) (sig []byte, err error) {
 }
 
 // VerifySignature checks that the given public key created signature over hash.
-// The public key should be in compressed (33 bytes) or uncompressed (64 bytes) format.
+// The public key should be in compressed (33 bytes) or uncompressed (65 bytes) format.
 // The signature should have the 64 byte [R || S] format.
 func VerifySignature(pubkey, hash, signature []byte) bool {
 	return secp256k1.VerifySignature(pubkey, hash, signature)
diff --git a/crypto/signature_nocgo.go b/crypto/signature_nocgo.go
index abee9d4880..17fd613b21 100644
--- a/crypto/signature_nocgo.go
+++ b/crypto/signature_nocgo.go
@@ -28,7 +28,7 @@ import (
 	"github.com/btcsuite/btcd/btcec"
 )
 
-// Ecrecover returns the public key that created the given signature.
+// Ecrecover returns the uncompressed public key that created the given signature.
 func Ecrecover(hash, sig []byte) ([]byte, error) {
 	pub, err := SigToPub(hash, sig)
 	if err != nil {