diff --git a/user/pctl/kill.c b/user/pctl/kill.c
index 359b554..954e6a6 100644
--- a/user/pctl/kill.c
+++ b/user/pctl/kill.c
@@ -1,7 +1,6 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <ulib.h>
-#include "kill.h"
 #include "macros.h"
 
 struct {
diff --git a/user/pctl/kill.h b/user/pctl/kill.h
deleted file mode 100644
index 754f71f..0000000
--- a/user/pctl/kill.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef PCTL_KILL_H_
-#define PCTL_KILL_H_
-
-void pctl_kill(void);
-
-#endif // PCTL_KILL_H_
diff --git a/user/pctl/ls.c b/user/pctl/ls.c
index 2152e00..6de3281 100644
--- a/user/pctl/ls.c
+++ b/user/pctl/ls.c
@@ -1,7 +1,6 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <ulib.h>
-#include "ls.h"
 #include "macros.h"
 
 struct {
diff --git a/user/pctl/ls.h b/user/pctl/ls.h
deleted file mode 100644
index 5423c4b..0000000
--- a/user/pctl/ls.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef PCTL_LS_H_
-#define PCTL_LS_H_
-
-void pctl_ls(void);
-
-#endif // PCTL_LS_H_
diff --git a/user/pctl/main.c b/user/pctl/main.c
index 01f0bfa..8f099fe 100644
--- a/user/pctl/main.c
+++ b/user/pctl/main.c
@@ -1,8 +1,9 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <ulib.h>
-#include "ls.h"
-#include "kill.h"
+
+extern void pctl_ls(void);
+extern void pctl_kill(void);
 
 void main(void) {
   if (argslen() == 0) {