diff --git a/lib/gssapi/mech/gss_utils.c b/lib/gssapi/mech/gss_utils.c
index 88d79dd40..62fa262af 100644
--- a/lib/gssapi/mech/gss_utils.c
+++ b/lib/gssapi/mech/gss_utils.c
@@ -177,6 +177,60 @@ _gss_secure_release_buffer_set(OM_uint32 *minor_status,
     return gss_release_buffer_set(minor_status, buffer_set);
 }
 
+void
+_gss_mg_encode_le_uint64(uint64_t n, uint8_t *p)
+{
+    p[0] = (n >> 0 ) & 0xFF;
+    p[1] = (n >> 8 ) & 0xFF;
+    p[2] = (n >> 16) & 0xFF;
+    p[3] = (n >> 24) & 0xFF;
+    p[4] = (n >> 32) & 0xFF;
+    p[5] = (n >> 40) & 0xFF;
+    p[6] = (n >> 48) & 0xFF;
+    p[7] = (n >> 56) & 0xFF;
+}
+
+void
+_gss_mg_decode_le_uint64(const void *ptr, uint64_t *n)
+{
+    const uint8_t *p = ptr;
+    *n = ((uint64_t)p[0] << 0)
+       | ((uint64_t)p[1] << 8)
+       | ((uint64_t)p[2] << 16)
+       | ((uint64_t)p[3] << 24)
+       | ((uint64_t)p[4] << 32)
+       | ((uint64_t)p[5] << 40)
+       | ((uint64_t)p[6] << 48)
+       | ((uint64_t)p[7] << 56);
+}
+
+void
+_gss_mg_encode_be_uint64(uint64_t n, uint8_t *p)
+{
+    p[0] = (n >> 56) & 0xFF;
+    p[1] = (n >> 48) & 0xFF;
+    p[2] = (n >> 40) & 0xFF;
+    p[3] = (n >> 32) & 0xFF;
+    p[4] = (n >> 24) & 0xFF;
+    p[5] = (n >> 16) & 0xFF;
+    p[6] = (n >> 8 ) & 0xFF;
+    p[7] = (n >> 0 ) & 0xFF;
+}
+
+void
+_gss_mg_decode_be_uint64(const void *ptr, uint64_t *n)
+{
+    const uint8_t *p = ptr;
+    *n = ((uint64_t)p[0] << 56)
+       | ((uint64_t)p[1] << 48)
+       | ((uint64_t)p[2] << 40)
+       | ((uint64_t)p[3] << 32)
+       | ((uint64_t)p[4] << 24)
+       | ((uint64_t)p[5] << 16)
+       | ((uint64_t)p[6] << 8)
+       | ((uint64_t)p[7] << 0);
+}
+
 void
 _gss_mg_encode_le_uint32(uint32_t n, uint8_t *p)
 {
diff --git a/lib/gssapi/mech/utils.h b/lib/gssapi/mech/utils.h
index 208a59cc8..717ca4916 100644
--- a/lib/gssapi/mech/utils.h
+++ b/lib/gssapi/mech/utils.h
@@ -36,6 +36,11 @@ OM_uint32 _gss_secure_release_buffer(OM_uint32 *minor_status,
 OM_uint32 _gss_secure_release_buffer_set(OM_uint32 *minor_status,
 					 gss_buffer_set_t *buffer_set);
 
+void _gss_mg_encode_le_uint64(uint64_t n, uint8_t *p);
+void _gss_mg_decode_le_uint64(const void *ptr, uint64_t *n);
+void _gss_mg_encode_be_uint64(uint64_t n, uint8_t *p);
+void _gss_mg_decode_be_uint64(const void *ptr, uint64_t *n);
+
 void _gss_mg_encode_le_uint32(uint32_t n, uint8_t *p);
 void _gss_mg_decode_le_uint32(const void *ptr, uint32_t *n);
 void _gss_mg_encode_be_uint32(uint32_t n, uint8_t *p);