diff --git a/src/shared/ethtool-util.c b/src/shared/ethtool-util.c
index e6fab262f2..3b3d37cccc 100644
--- a/src/shared/ethtool-util.c
+++ b/src/shared/ethtool-util.c
@@ -150,6 +150,8 @@ static const char* const ethtool_link_mode_bit_table[] = {
         [ETHTOOL_LINK_MODE_400000baseLR4_ER4_FR4_Full_BIT] = "400000baselr4-er4-fr4-full",
         [ETHTOOL_LINK_MODE_400000baseDR4_Full_BIT]         = "400000basedr4-full",
         [ETHTOOL_LINK_MODE_400000baseCR4_Full_BIT]         = "400000basecr4-full",
+        [ETHTOOL_LINK_MODE_100baseFX_Half_BIT]             = "100basefx-half",
+        [ETHTOOL_LINK_MODE_100baseFX_Full_BIT]             = "100basefx-full",
 };
 /* Make sure the array is large enough to fit all bits */
 assert_cc((ELEMENTSOF(ethtool_link_mode_bit_table)-1) / 32 < N_ADVERTISE);