diff --git a/cpukit/ChangeLog b/cpukit/ChangeLog
index a1d7020f10..f13c7de0c0 100644
--- a/cpukit/ChangeLog
+++ b/cpukit/ChangeLog
@@ -1,3 +1,8 @@
+2011-05-11	Sebastian Huber <sebastian.huber@embedded-brains.de>
+
+	PR 1790/cpukit
+	* libblock/src/flashdisk.c: Fixed memset() parameters.
+
 2011-04-16	Chris Johns <chrisj@rtems.org>
 
 	PR 1774/filesystem
diff --git a/cpukit/libblock/src/flashdisk.c b/cpukit/libblock/src/flashdisk.c
index 9fc004d597..ed6c6c4eb5 100644
--- a/cpukit/libblock/src/flashdisk.c
+++ b/cpukit/libblock/src/flashdisk.c
@@ -1731,7 +1731,7 @@ rtems_fdisk_read_block (rtems_flashdisk* fd,
 #if RTEMS_FDISK_TRACE
     rtems_fdisk_info (fd, "read-block: no segment mapping: %d", block);
 #endif
-    memset (buffer, fd->block_size, 0xff);
+    memset (buffer, 0xff, fd->block_size);
     return 0;
   }