diff --git a/winsize_unsupported.go b/winsize_unsupported.go
index c4bff44..73fb080 100644
--- a/winsize_unsupported.go
+++ b/winsize_unsupported.go
@@ -9,7 +9,7 @@ import (
 
 // Winsize is a dummy struct to enable compilation on unsupported platforms.
 type Winsize struct {
-	Rows, Cols, X, Y uint
+	Rows, Cols, X, Y uint16
 }
 
 // Setsize resizes t to s.