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);