diff --git a/crypto.go b/crypto.go
index 684b1100..8b23e2fc 100644
--- a/crypto.go
+++ b/crypto.go
@@ -47,7 +47,7 @@ func loadPrivateKey(file string) (crypto.PrivateKey, error) {
 
 	switch keyBlock.Type {
 	case "RSA PRIVATE KEY":
-		x509.ParsePKCS1PrivateKey(keyBlock.Bytes)
+		return x509.ParsePKCS1PrivateKey(keyBlock.Bytes)
 	case "EC PRIVATE KEY":
 		return x509.ParseECPrivateKey(keyBlock.Bytes)
 	}