diff --git a/sys/dev/sfxge/common/efsys.h b/sys/dev/sfxge/common/efsys.h
index be73ea1909a..10dc04ded67 100644
--- a/sys/dev/sfxge/common/efsys.h
+++ b/sys/dev/sfxge/common/efsys.h
@@ -246,6 +246,7 @@ sfxge_map_mbuf_fast(bus_dma_tag_t tag, bus_dmamap_t map,
 
 #define	EFSYS_OPT_MCDI 1
 #define	EFSYS_OPT_MCDI_LOGGING 0
+#define	EFSYS_OPT_MCDI_PROXY_AUTH 0
 
 #define	EFSYS_OPT_MAC_FALCON_GMAC 0
 #define	EFSYS_OPT_MAC_FALCON_XMAC 0
diff --git a/sys/dev/sfxge/common/efx_check.h b/sys/dev/sfxge/common/efx_check.h
index e3a68273cbc..684cbbfbe95 100644
--- a/sys/dev/sfxge/common/efx_check.h
+++ b/sys/dev/sfxge/common/efx_check.h
@@ -153,6 +153,13 @@
 # endif
 #endif /* EFSYS_OPT_MCDI_LOGGING */
 
+/* Support MCDI proxy authorization */
+#if EFSYS_OPT_MCDI_PROXY_AUTH
+# if !EFSYS_OPT_MCDI
+#  error "MCDI_PROXY_AUTH requires MCDI"
+# endif
+#endif /* EFSYS_OPT_MCDI_PROXY_AUTH */
+
 /* Support LM87 monitor */
 #if EFSYS_OPT_MON_LM87
 # if !EFSYS_OPT_FALCON