diff --git a/src/tools.rs b/src/tools.rs
index 6c22a62c..f752201e 100644
--- a/src/tools.rs
+++ b/src/tools.rs
@@ -13,14 +13,14 @@ use std::os::unix::io::AsRawFd;
 
 pub mod timer;
 
-fn map_struct<T>(buffer: &[u8]) -> Result<&T, Error> {
+pub fn map_struct<T>(buffer: &[u8]) -> Result<&T, Error> {
     if buffer.len() < ::std::mem::size_of::<T>() {
         bail!("unable to map struct - buffer too small");
     }
     return Ok(unsafe { & * (buffer.as_ptr() as *const T) });
 }
 
-fn map_struct_mut<T>(buffer: &mut [u8]) -> Result<&mut T, Error> {
+pub fn map_struct_mut<T>(buffer: &mut [u8]) -> Result<&mut T, Error> {
     if buffer.len() < ::std::mem::size_of::<T>() {
         bail!("unable to map struct - buffer too small");
     }