diff --git a/ChangeLog b/ChangeLog
index 7bd06b149..f64edf44e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2009-07-01  Pavel Roskin  <proski@gnu.org>
 
+	* util/hostdisk.c (device_is_wholedisk): Compile only on systems
+	where it's needed.
+
 	* Makefile.in: Install include/grub/machine symlink.
 
 	* Makefile.in: When installing symlinks, use "cp -fR", which
diff --git a/util/hostdisk.c b/util/hostdisk.c
index 1844a7e55..46afc3882 100644
--- a/util/hostdisk.c
+++ b/util/hostdisk.c
@@ -833,6 +833,7 @@ convert_system_partition_to_system_disk (const char *os_dev)
 #endif
 }
 
+#if defined(__linux__) || defined(__CYGWIN__)
 static int
 device_is_wholedisk (const char *os_dev)
 {
@@ -842,6 +843,7 @@ device_is_wholedisk (const char *os_dev)
     return 1;
   return 0;
 }
+#endif
 
 static int
 find_system_device (const char *os_dev)