Index: head/sys/dev/sfxge/common/efx_mcdi.c
===================================================================
--- head/sys/dev/sfxge/common/efx_mcdi.c
+++ head/sys/dev/sfxge/common/efx_mcdi.c
@@ -1465,6 +1465,7 @@
 	const char *namep;
 	size_t namelen;
 #endif
+	uint32_t phy_media_type;
 	efx_rc_t rc;
 
 	(void) memset(payload, 0, sizeof (payload));
@@ -1515,8 +1516,8 @@
 	EFX_STATIC_ASSERT(MC_CMD_MEDIA_SFP_PLUS == EFX_PHY_MEDIA_SFP_PLUS);
 	EFX_STATIC_ASSERT(MC_CMD_MEDIA_BASE_T == EFX_PHY_MEDIA_BASE_T);
 	EFX_STATIC_ASSERT(MC_CMD_MEDIA_QSFP_PLUS == EFX_PHY_MEDIA_QSFP_PLUS);
-	epp->ep_fixed_port_type =
-		MCDI_OUT_DWORD(req, GET_PHY_CFG_OUT_MEDIA_TYPE);
+	phy_media_type = MCDI_OUT_DWORD(req, GET_PHY_CFG_OUT_MEDIA_TYPE);
+	epp->ep_fixed_port_type = (efx_phy_media_type_t) phy_media_type;
 	if (epp->ep_fixed_port_type >= EFX_PHY_MEDIA_NTYPES)
 		epp->ep_fixed_port_type = EFX_PHY_MEDIA_INVALID;