diff --git a/acme/account.go b/acme/account.go
index 0cc5e93f3..b2390cebc 100644
--- a/acme/account.go
+++ b/acme/account.go
@@ -111,7 +111,12 @@ func (a *Account) GetPrivateKey() crypto.PrivateKey {
 		return privateKey
 	}
 
-	log.Errorf("Cannot unmarshall private key %+v", a.PrivateKey)
+	keySnippet := ""
+	if len(a.PrivateKey) >= 16 {
+		keySnippet = string(a.PrivateKey[:16])
+	}
+
+	log.Errorf("Cannot unmarshall private key beginning with %s", keySnippet)
 	return nil
 }
 
diff --git a/provider/acme/account.go b/provider/acme/account.go
index 79a2587d0..e98101630 100644
--- a/provider/acme/account.go
+++ b/provider/acme/account.go
@@ -57,7 +57,12 @@ func (a *Account) GetPrivateKey() crypto.PrivateKey {
 		return privateKey
 	}
 
-	log.Errorf("Cannot unmarshal private key %+v", a.PrivateKey)
+	keySnippet := ""
+	if len(a.PrivateKey) >= 16 {
+		keySnippet = string(a.PrivateKey[:16])
+	}
+
+	log.Errorf("Cannot unmarshall private key beginning with %s", keySnippet)
 	return nil
 }