diff --git a/crypto/vrf/internal/vrf/vrf.go b/crypto/vrf/internal/vrf/vrf.go
index 825a77e2f..c610032a3 100644
--- a/crypto/vrf/internal/vrf/vrf.go
+++ b/crypto/vrf/internal/vrf/vrf.go
@@ -61,8 +61,7 @@ func Prove(privateKey *[SECRETKEYBYTES]byte, message []byte) (*[PROOFBYTES]byte,
     messagePtr := (*C.uchar)(unsafe.Pointer(&message))
     messageLen := (C.ulonglong)(len(message))
     if C.crypto_vrf_prove(proofPtr, privateKeyPtr, messagePtr, messageLen) != 0 {
-        return nil, errors.New(fmt.Sprintf("unable to decode the given privateKey: %s",
-            hex.EncodeToString(privateKey[:])))
+        return nil, errors.New(fmt.Sprintf("unable to decode the given privateKey"))
     }
     return &proof, nil
 }
diff --git a/crypto/vrf/vrf_test.go b/crypto/vrf/vrf_test.go
index d20bc5a5c..8521a104e 100644
--- a/crypto/vrf/vrf_test.go
+++ b/crypto/vrf/vrf_test.go
@@ -282,6 +282,6 @@ func TestProve(t *testing.T) {
     if err3 != nil {
         t.Errorf("failed to verify: %s", err3)
     } else if ! bytes.Equal(hash1[:], hash2[:]) {
-        t.Errorf("output incompativle: %s != %s", enc(hash1[:]), enc(hash2[:]))
+        t.Errorf("incompatible output: %s != %s", enc(hash1[:]), enc(hash2[:]))
     }
 }