diff --git a/Utils.cpp b/Utils.cpp
index 72d3801..443df1d 100644
--- a/Utils.cpp
+++ b/Utils.cpp
@@ -432,7 +432,7 @@
 uint64_t GetFreeBytes(const std::string& path) {
     struct statvfs sb;
     if (statvfs(path.c_str(), &sb) == 0) {
-        return (uint64_t)sb.f_bfree * sb.f_bsize;
+        return (uint64_t) sb.f_bavail * sb.f_frsize;
     } else {
         return -1;
     }