diff --git a/src/file_cache_row.cpp b/src/file_cache_row.cpp
index 4d0e096..bc08ff7 100644
--- a/src/file_cache_row.cpp
+++ b/src/file_cache_row.cpp
@@ -7,6 +7,7 @@
 #include <fcntl.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <math.h>
 
 #include <megaclient.h>
 #include <sys/stat.h>