diff --git a/src/rx/xdr_len.c b/src/rx/xdr_len.c
index b0bd80809a..7a55daa585 100644
--- a/src/rx/xdr_len.c
+++ b/src/rx/xdr_len.c
@@ -90,14 +90,21 @@ static struct xdr_ops xdrlen_ops = {
     NULL,
 #endif
     /* Windows does not support labeled assigments */
+#if !(defined(KERNEL) && defined(AFS_SUN57_ENV))
     xdrlen_getint32,    /* not supported */
     xdrlen_putint32,    /* serialize an afs_int32 */
+#endif
     xdrlen_getbytes,    /* not supported */
     xdrlen_putbytes,    /* serialize counted bytes */
     xdrlen_getpos,      /* get offset in the stream */
     xdrlen_setpos,      /* set offset in the stream */
     xdrlen_inline,      /* not supported */
-    xdrlen_destroy      /* destroy stream */
+    xdrlen_destroy,     /* destroy stream */
+#if (defined(KERNEL) && defined(AFS_SUN57_ENV))
+    NULL,               /* control - not implemented */
+    xdrlen_getint32,    /* not supported */
+    xdrlen_putint32,    /* serialize an afs_int32 */
+#endif
 #else
 #ifdef AFS_XDR_64BITOPS
     .x_getint64 = NULL,
diff --git a/src/rx/xdr_mem.c b/src/rx/xdr_mem.c
index a489f6be98..475ea03c6a 100644
--- a/src/rx/xdr_mem.c
+++ b/src/rx/xdr_mem.c
@@ -68,14 +68,21 @@ static struct xdr_ops xdrmem_ops = {
     NULL,
 #endif
     /* Windows does not support labeled assigments */
+#if !(defined(KERNEL) && defined(AFS_SUN57_ENV))
     xdrmem_getint32,    /* deserialize an afs_int32 */
     xdrmem_putint32,    /* serialize an afs_int32 */
+#endif
     xdrmem_getbytes,    /* deserialize counted bytes */
     xdrmem_putbytes,    /* serialize counted bytes */
     xdrmem_getpos,      /* get offset in the stream: not supported. */
     xdrmem_setpos,      /* set offset in the stream: not supported. */
     xdrmem_inline,      /* prime stream for inline macros */
-    xdrmem_destroy      /* destroy stream */
+    xdrmem_destroy,     /* destroy stream */
+#if (defined(KERNEL) && defined(AFS_SUN57_ENV))
+    NULL,               /* control - not implemented */
+    xdrmem_getint32,    /* not supported */
+    xdrmem_putint32,    /* serialize an afs_int32 */
+#endif
 #else
 #ifdef AFS_XDR_64BITOPS
     .x_getint64 = NULL,
diff --git a/src/rx/xdr_rec.c b/src/rx/xdr_rec.c
index a99cfb1383..ddec33359b 100644
--- a/src/rx/xdr_rec.c
+++ b/src/rx/xdr_rec.c
@@ -123,14 +123,21 @@ static struct xdr_ops xdrrec_ops = {
     NULL,
 #endif
     /* Windows does not support labeled assignments */
+#if !(defined(KERNEL) && defined(AFS_SUN57_ENV))
     xdrrec_getint32,    /* deserialize an afs_int32 */
     xdrrec_putint32,    /* serialize an afs_int32 */
+#endif
     xdrrec_getbytes,    /* deserialize counted bytes */
     xdrrec_putbytes,    /* serialize counted bytes */
     xdrrec_getpos,      /* get offset in the stream: not supported. */
     xdrrec_setpos,      /* set offset in the stream: not supported. */
     xdrrec_inline,      /* prime stream for inline macros */
-    xdrrec_destroy      /* destroy stream */
+    xdrrec_destroy,     /* destroy stream */
+#if (defined(KERNEL) && defined(AFS_SUN57_ENV))
+    NULL,
+    xdrrec_getint32,    /* deserialize an afs_int32 */
+    xdrrec_putint32,    /* serialize an afs_int32 */
+#endif
 #else
 #ifdef AFS_XDR_64BITOPS
     .x_getint64 = NULL,
diff --git a/src/rx/xdr_rx.c b/src/rx/xdr_rx.c
index 2852b6ab04..85e3ba2746 100644
--- a/src/rx/xdr_rx.c
+++ b/src/rx/xdr_rx.c
@@ -86,14 +86,21 @@ static struct xdr_ops xdrrx_ops = {
     xdrrx_putint64,     /* serialize an afs_int64 */
 #endif
     /* Windows does not support labeled assigments */
+#if !(defined(KERNEL) && defined(AFS_SUN57_ENV))
     xdrrx_getint32,	/* deserialize an afs_int32 */
     xdrrx_putint32,	/* serialize an afs_int32 */
+#endif
     xdrrx_getbytes,	/* deserialize counted bytes */
     xdrrx_putbytes,	/* serialize counted bytes */
     NULL,		/* get offset in the stream: not supported. */
     NULL,		/* set offset in the stream: not supported. */
     xdrrx_inline,	/* prime stream for inline macros */
-    NULL		/* destroy stream */
+    NULL,		/* destroy stream */
+#if (defined(KERNEL) && defined(AFS_SUN57_ENV))
+    NULL,               /* control - not implemented */
+    xdrrx_getint32,     /* not supported */
+    xdrrx_putint32,     /* serialize an afs_int32 */
+#endif
 #else
 #ifdef AFS_XDR_64BITOPS
     .x_getint64 = xdrrx_getint64,
diff --git a/src/rx/xdr_stdio.c b/src/rx/xdr_stdio.c
index da280b80dc..ee941e7e75 100644
--- a/src/rx/xdr_stdio.c
+++ b/src/rx/xdr_stdio.c
@@ -64,14 +64,21 @@ static struct xdr_ops xdrstdio_ops = {
     NULL,
 #endif
     /* Windows does not support labeled assignments */
+#if !(defined(KERNEL) && defined(AFS_SUN57_ENV))
     xdrstdio_getint32,	        /* deserialize an afs_int32 */
     xdrstdio_putint32,	        /* serialize an afs_int32 */
+#endif
     xdrstdio_getbytes,	        /* deserialize counted bytes */
     xdrstdio_putbytes,	        /* serialize counted bytes */
     xdrstdio_getpos,	        /* get offset in the stream */
     xdrstdio_setpos,	        /* set offset in the stream */
     xdrstdio_inline,	        /* prime stream for inline macros */
-    xdrstdio_destroy	        /* destroy stream */
+    xdrstdio_destroy,	        /* destroy stream */
+#if (defined(KERNEL) && defined(AFS_SUN57_ENV))
+    NULL,
+    xdrstdio_getint32,    /* deserialize an afs_int32 */
+    xdrstdio_putint32,    /* serialize an afs_int32 */
+#endif
 #else
 #ifdef AFS_XDR_64BITOPS
     .x_getint64 = NULL,