diff --git a/src/basic/missing.h b/src/basic/missing.h
index 85af7acdfe..45788af9e7 100644
--- a/src/basic/missing.h
+++ b/src/basic/missing.h
@@ -1577,11 +1577,4 @@ enum ethtool_link_mode_bit_indices {
 #endif
 #endif
 
-/* Strictly speaking, this is not a missing field. Just for our convention. */
-#if !HAVE_ETHTOOL_LINK_MODE_FEC_NONE_BIT
-#define _ETHTOOL_LINK_MODE_MAX                       52
-#else
-#define _ETHTOOL_LINK_MODE_MAX                       (__ETHTOOL_LINK_MODE_LAST + 1)
-#endif
-
 #include "missing_syscall.h"
diff --git a/src/udev/net/ethtool-util.c b/src/udev/net/ethtool-util.c
index 4cf6f269e3..177b273e48 100644
--- a/src/udev/net/ethtool-util.c
+++ b/src/udev/net/ethtool-util.c
@@ -56,7 +56,7 @@ static const char* const netdev_feature_table[_NET_DEV_FEAT_MAX] = {
         [NET_DEV_FEAT_TSO6] = "tx-tcp6-segmentation",
 };
 
-static const char* const ethtool_link_mode_bit_table[_ETHTOOL_LINK_MODE_MAX] = {
+static const char* const ethtool_link_mode_bit_table[] = {
         [ETHTOOL_LINK_MODE_10baseT_Half_BIT]           = "10baset-half",
         [ETHTOOL_LINK_MODE_10baseT_Full_BIT]           = "10baset-full",
         [ETHTOOL_LINK_MODE_100baseT_Half_BIT]          = "100baset-half",