diff --git a/CMakeLists.txt b/CMakeLists.txt
index ad1dd54..bceacec 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -97,7 +97,12 @@ check_cxx_source_compiles ("#include <sys/types.h>
 include (CheckFuncs)
 check_function_exists_glibc (lchmod HAVE_LCHMOD)
 check_function_exists_glibc (utimensat HAVE_UTIMENSAT)
-check_function_exists_glibc (fdatasync HAVE_FDATASYNC)
+if (APPLE)
+  message ("-- There is no usable FDATASYNC on Apple")
+  set(HAVE_FDATASYNC FALSE)
+else()
+  check_function_exists_glibc (fdatasync HAVE_FDATASYNC)
+endif (APPLE)
 
 set (CMAKE_THREAD_PREFER_PTHREAD)
 find_package (Threads REQUIRED)
diff --git a/encfs/FileNode.cpp b/encfs/FileNode.cpp
index 4ae65a7..33fb132 100644
--- a/encfs/FileNode.cpp
+++ b/encfs/FileNode.cpp
@@ -258,7 +258,7 @@ int FileNode::sync(bool datasync) {
   int fh = io->open(O_RDONLY);
   if (fh >= 0) {
     int res = -EIO;
-#ifdef linux
+#if defined(HAVE_FDATASYNC)
     if (datasync) {
       res = fdatasync(fh);
     } else {