diff --git a/source/durandal/ffi.rs b/source/durandal/ffi.rs
index 5d61932..7140912 100644
--- a/source/durandal/ffi.rs
+++ b/source/durandal/ffi.rs
@@ -6,7 +6,7 @@ pub use std::{ffi::*, os::raw::*, ptr::{null, null_mut}};
 /// Creates a C string from a literal.
 #[macro_export]
 macro_rules! c_str {
-   ($s:expr) => {concat!($s, "\0").as_ptr() as *const c_char};
+   ($s:expr) => {concat!($s, "\0").as_ptr() as $crate::durandal::ffi::NT};
 }
 
 impl CStringVec
@@ -14,7 +14,7 @@ impl CStringVec
    /// Creates a new empty CStringVec.
    pub fn new() -> Self
    {
-      Self::default()
+      Self{sv: Vec::new(), cv: vec![null()]}
    }
 
    /// Creates a new `CStringVec` from an iterator.
@@ -33,29 +33,32 @@ impl CStringVec
    /// Pushes a new `CString`.
    pub fn push(&mut self, st: CString)
    {
-      self.cv.push(st.as_c_str().as_ptr());
+      self.cv.insert(self.cv.len() - 1, st.as_c_str().as_ptr());
       self.sv.push(st);
    }
 
    /// Returns the FFI pointer.
-   pub fn as_ptr(&self) -> *const *const c_char
+   pub fn as_ptr(&self) -> *const NT
    {
       self.cv.as_ptr()
    }
 
    /// Returns the FFI pointer mutably.
-   pub fn as_mut_ptr(&mut self) -> *mut *const c_char
+   pub fn as_mut_ptr(&mut self) -> *mut NT
    {
       self.cv.as_mut_ptr()
    }
 }
 
-/// An owned FFI-compatible string vector.
-#[derive(Default)]
+/// An owned null-terminated string vector.
+#[derive(Debug)]
 pub struct CStringVec
 {
    sv: Vec<CString>,
-   cv: Vec<*const c_char>,
+   cv: Vec<NT>,
 }
 
+/// A null-terminated byte string pointer.
+pub type NT = *const c_char;
+
 // EOF