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-rw-r--r--cpukit/libcsupport/src/fsync.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/cpukit/libcsupport/src/fsync.c b/cpukit/libcsupport/src/fsync.c
index b77c77312c..eef1f85171 100644
--- a/cpukit/libcsupport/src/fsync.c
+++ b/cpukit/libcsupport/src/fsync.c
@@ -24,6 +24,7 @@ int fsync(
rtems_libio_check_fd( fd );
iop = rtems_libio_iop( fd );
+ rtems_libio_check_is_open(iop);
rtems_libio_check_permissions( iop, LIBIO_FLAGS_WRITE );
/*