diff --git a/py/str.go b/py/str.go
index 70ac4d5..d68a884 100644
--- a/py/str.go
+++ b/py/str.go
@@ -10,7 +10,7 @@ func Chr(x rune) string {
 
 func Ord(x string) rune {
 	if len(x) != 1 {
-		panic("Ord require a string with lenght 1")
+		panic("Ord requires a string with lenght 1")
 	}
 	return rune(x[0])
 }