diff --git a/src/file_cache_row.cpp b/src/file_cache_row.cpp
index 4d0e096..9c17684 100644
--- a/src/file_cache_row.cpp
+++ b/src/file_cache_row.cpp
@@ -5,6 +5,7 @@
 #include "file_cache_row.h"
 #include "Config.h"
 #include <fcntl.h>
+#include <cmath>
 #include <stdlib.h>
 #include <unistd.h>