diff --git a/pkstrings/src/pkstring.rs b/pkstrings/src/pkstring.rs
index 7d044e3..8c79768 100644
--- a/pkstrings/src/pkstring.rs
+++ b/pkstrings/src/pkstring.rs
@@ -162,7 +162,13 @@ impl TryFrom<Vec<u8>> for PKString {
     type Error = Error;
 
     fn try_from(data: Vec<u8>) -> Result<PKString, Error> {
-        PKString::try_from(data.as_slice())
+        for ord in &data {
+            if ! in_range(*ord) {
+                return Err(Error::InvalidByte(*ord))
+            }
+        }
+
+        Ok(PKString(data))
     }
 }