diff --git a/e4rat/src/defrag.cc b/e4rat/src/defrag.cc

index be08312..28b5655 100644

--- a/e4rat/src/defrag.cc

+++ b/e4rat/src/defrag.cc

@@ -36,6 +36,8 @@

 #include <dirent.h>

 #include <stdexcept>

+#include <math.h>

+

 #include <boost/foreach.hpp>

 // set thread priority

diff --git a/e4rat/src/device.hh b/e4rat/src/device.hh

index fd881df..9062cbf 100644

--- a/e4rat/src/device.hh

+++ b/e4rat/src/device.hh

@@ -25,6 +25,7 @@

 #include <ext2fs/ext2fs.h>

 #include <ext2fs/ext2_fs.h>

+#include <boost/shared_ptr.hpp>

 fs::path __getMountPoint(fs::path path);