diff --git a/usr.bin/truss/i386.conf b/usr.bin/truss/i386.conf
index 20407cbd905f..c849b9ec2d47 100644
--- a/usr.bin/truss/i386.conf
+++ b/usr.bin/truss/i386.conf
@@ -2,6 +2,7 @@ sysnames="syscalls.h"
 sysproto="/dev/null"
 sysproto_h="/dev/null"
 syshdr="/dev/null"
+sysmk="/dev/null"
 syssw="/dev/null"
 syshide="/dev/null"
 syscallprefix="SYS_"
diff --git a/usr.bin/truss/i386linux.conf b/usr.bin/truss/i386linux.conf
index 118150d39f0b..af9b188c9d04 100644
--- a/usr.bin/truss/i386linux.conf
+++ b/usr.bin/truss/i386linux.conf
@@ -2,6 +2,7 @@ sysnames="linux_syscalls.h"
 sysproto="/dev/null"
 sysproto_h="/dev/null"
 syshdr="/dev/null"
+sysmk="/dev/null"
 syssw="/dev/null"
 syshide="/dev/null"
 syscallprefix="SYS_"