diff --git a/cpukit/libfs/src/jffs2/src/fs-rtems.c b/cpukit/libfs/src/jffs2/src/fs-rtems.c
index ceeb6094a0..d9d6864e7f 100644
--- a/cpukit/libfs/src/jffs2/src/fs-rtems.c
+++ b/cpukit/libfs/src/jffs2/src/fs-rtems.c
@@ -25,6 +25,7 @@
 #include <errno.h>
 #include <string.h>
 #include <assert.h>
+#include <rtems/libio.h>
 #include <rtems/libio_.h>
 
 /* Ensure that the JFFS2 values are identical to the POSIX defines */