diff --git a/sparte.go b/sparte.go
index f9a9592..8619d4a 100644
--- a/sparte.go
+++ b/sparte.go
@@ -138,7 +138,7 @@ func main() {
 			var err error
 			if file == "-" {
 				stat, _ := os.Stdin.Stat()
-				if (stat.Mode() & os.ModeCharDevice) == 0 {
+				if (stat.Mode() & os.ModeCharDevice) != 0 {
 					fmt.Println("nothing in stdin")
 					os.Exit(1)
 				}