diff --git a/resolution.go b/resolution.go
index fa9d35c..3e4894d 100644
--- a/resolution.go
+++ b/resolution.go
@@ -45,6 +45,6 @@ func (r Resolution) String() string {
 	case ResolutionSD:
 		return "SD"
 	default:
-		return fmt.Sprintf("%sp", r)
+		return fmt.Sprintf("%dp", r)
 	}
 }