diff --git a/cpukit/libfs/src/nfsclient/src/rpcio.c b/cpukit/libfs/src/nfsclient/src/rpcio.c
index e9c64c55ab..5e3abe416a 100644
--- a/cpukit/libfs/src/nfsclient/src/rpcio.c
+++ b/cpukit/libfs/src/nfsclient/src/rpcio.c
@@ -1594,7 +1594,6 @@ RpcUdpXactPool pool;
  *             the RTEMS/BSDNET headers redefine those :-(
  */
 
-#define KERNEL
 #define _KERNEL
 #include <sys/mbuf.h>
 
diff --git a/cpukit/libfs/src/nfsclient/src/sock_mbuf.c b/cpukit/libfs/src/nfsclient/src/sock_mbuf.c
index 217d8b6874..d0f5edadf5 100644
--- a/cpukit/libfs/src/nfsclient/src/sock_mbuf.c
+++ b/cpukit/libfs/src/nfsclient/src/sock_mbuf.c
@@ -84,7 +84,6 @@ SOFTWARE.
 #include <rtems/libio.h>
 #include <rtems/error.h>
 
-#define KERNEL
 #define _KERNEL
 #define __BSD_VISIBLE	1
 #include <rtems/rtems_bsdnet.h>
diff --git a/cpukit/libfs/src/nfsclient/src/xdr_mbuf.c b/cpukit/libfs/src/nfsclient/src/xdr_mbuf.c
index 8c7d099761..773a460762 100644
--- a/cpukit/libfs/src/nfsclient/src/xdr_mbuf.c
+++ b/cpukit/libfs/src/nfsclient/src/xdr_mbuf.c
@@ -81,7 +81,7 @@ my_free(void *p)
 
 #define DEBUG			DEBUG_ASSERT
 
-#define KERNEL
+#define _KERNEL
 #include <sys/mbuf.h>
 
 #include <assert.h>