diff --git a/serde/src/de/impls.rs b/serde/src/de/impls.rs
index 1ad97538..6a8c1a77 100644
--- a/serde/src/de/impls.rs
+++ b/serde/src/de/impls.rs
@@ -315,8 +315,7 @@ impl Deserialize for CString {
     fn deserialize<D>(deserializer: D) -> Result<CString, D::Error>
         where D: Deserializer
     {
-        let mut v: Vec<u8> = try!(Deserialize::deserialize(deserializer));
-        v.pop(); // cut trailing NULL, because CString::new adds it
+        let v: Vec<u8> = try!(Deserialize::deserialize(deserializer));
         CString::new(v)
             .map_err(|e| Error::custom(format!("unexpected NULL at byte {}", e.nul_position())))
     }
diff --git a/serde/src/ser/impls.rs b/serde/src/ser/impls.rs
index 32eb716f..7d44ab34 100644
--- a/serde/src/ser/impls.rs
+++ b/serde/src/ser/impls.rs
@@ -106,7 +106,7 @@ impl Serialize for CStr {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
         where S: Serializer
     {
-        (self.to_bytes_with_nul()).serialize(serializer)
+        self.to_bytes().serialize(serializer)
     }
 }
 
@@ -116,7 +116,7 @@ impl Serialize for CString {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
         where S: Serializer
     {
-        (self.to_bytes_with_nul()).serialize(serializer)
+        self.to_bytes().serialize(serializer)
     }
 }