diff --git a/test/fspp/fuse/fdatasync/testutils/FuseFdatasyncTest.cpp b/test/fspp/fuse/fdatasync/testutils/FuseFdatasyncTest.cpp
index 245ab895..938239ed 100644
--- a/test/fspp/fuse/fdatasync/testutils/FuseFdatasyncTest.cpp
+++ b/test/fspp/fuse/fdatasync/testutils/FuseFdatasyncTest.cpp
@@ -17,7 +17,7 @@ int FuseFdatasyncTest::FdatasyncFileReturnError(const char *filename) {
   // This is MacOSX, which doesn't know fdatasync
   int retval = fcntl(fd->fd(), F_FULLFSYNC);
 #else
-  int retval = ::fdatasync(fd);
+  int retval = ::fdatasync(fd->fd());
 #endif
   if (retval != -1) {
     return 0;