diff --git a/README.md b/README.md
index cf006aad..6fa554a6 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,10 @@ where `macro_name` is a string, and `macro_definition` is any valid Falco condit
 
 
 
+#### Ignored system calls
 
+For performance reasons, some system calls are currently discarded before Falco processing. The current list is: 
+`clock_getres,clock_gettime,clock_nanosleep,clock_settime,close,epoll_create,epoll_create1,epoll_ctl,epoll_pwait,epoll_wait,eventfd,fcntl,fcntl64,fstat,fstat64,getitimer,gettimeofday,nanosleep,poll,ppoll,pread64,preadv,pselect6,pwrite64,pwritev,read,readv,recv,recvfrom,recvmmsg,recvmsg,select,send,sendfile,sendfile64,sendmmsg,sendmsg,sendto,setitimer,settimeofday,shutdown,socket,splice,switch,tee,timer_create,timer_delete,timerfd_create,timerfd_gettime,timerfd_settime,timer_getoverrun,timer_gettime,timer_settime,wait4,write,writev,`
 
 
 
@@ -51,6 +54,7 @@ where `macro_name` is a string, and `macro_definition` is any valid Falco condit
 ### Configuration file
 Falco is configured via a yaml file. The sample config `falco.yaml` in this repo has comments describing the various options.
 
+
 ## Running Falco
 
 Falco is intended to be run as a service. But for experimentation and designing/testing rulesets, you will likely want to run it manually from the command-line.