diff --git a/share/man/man4/igc.4 b/share/man/man4/igc.4
index cf36e584a679..f9bca716f7fe 100644
--- a/share/man/man4/igc.4
+++ b/share/man/man4/igc.4
@@ -100,21 +100,6 @@ Disable or enable hardware stripping of CRC field.
 This is mostly useful on BMC/IPMI shared interfaces where stripping the
 CRC causes remote access over IPMI to fail.
 Default 0 (enabled).
-.It Va hw.igc.rx_int_delay
-This value delays the generation of receive interrupts in units
-of 1.024 microseconds.
-The default value is 0, since adapters may hang with this feature being
-enabled.
-.It Va hw.igc.rx_abs_int_delay
-If hw.igc.rx_int_delay is non-zero, this tunable limits the
-maximum delay in which a receive interrupt is generated.
-.It Va hw.igc.tx_int_delay
-This value delays the generation of transmit interrupts in units
-of 1.024 microseconds.
-The default value is 64.
-.It Va hw.igc.tx_abs_int_delay
-If hw.igc.tx_int_delay is non-zero, this tunable limits the
-maximum delay in which a transmit interrupt is generated.
 .It Va hw.igc.sbp
 Show bad packets when in promiscuous mode.
 Default is false.