Fix a format string issue that Go 1.10 complains about.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/regress/lib/libtls/gotls/tls.go b/src/regress/lib/libtls/gotls/tls.go
index 961dde1308..be75e71f4f 100644
--- a/src/regress/lib/libtls/gotls/tls.go
+++ b/src/regress/lib/libtls/gotls/tls.go
@@ -31,7 +31,7 @@ type ProtocolVersion uint32
 func (pv ProtocolVersion) String() string {
         name, ok := protocolNames[pv]
         if !ok {
-                return fmt.Sprintf("unknown protocol version %x", pv)
+                return fmt.Sprintf("unknown protocol version %x", uint32(pv))
         }
         return name
 }