diff --git a/proj/unixsim/simnode.c b/proj/unixsim/simnode.c
index f20fa18f..baee0ebf 100644
--- a/proj/unixsim/simnode.c
+++ b/proj/unixsim/simnode.c
@@ -52,9 +52,6 @@
 
 #include "netif/tcpdump.h"
 
-#include "netif/sioslipif.h"
-
-
 #include "lwip/ip_addr.h"
 
 #include "arch/perf.h"
diff --git a/proj/unixsim/simrouter.c b/proj/unixsim/simrouter.c
index bd43aa48..7471a053 100644
--- a/proj/unixsim/simrouter.c
+++ b/proj/unixsim/simrouter.c
@@ -53,8 +53,6 @@
 
 #include "netif/tcpdump.h"
 
-#include "netif/sioslipif.h"
-
 
 #include "lwip/ip_addr.h"