diff --git a/user/pctl/ls.c b/user/pctl/ls.c
index 475e60d..c0c01dd 100644
--- a/user/pctl/ls.c
+++ b/user/pctl/ls.c
@@ -13,10 +13,15 @@
 
 struct {
   char *specificproc;
-} PCTL_LS_CONFIG;
+  int32_t pid;
+} PCTL_LS_CONFIG = {
+  .specificproc = NULL,
+  .pid = -1,
+};
 
 static Arg ARGS[] = {
   ARG("-proc", ARG_STRING, &PCTL_LS_CONFIG.specificproc),
+  ARG("-pid", ARG_INT, &PCTL_LS_CONFIG.pid),
   ARG_END(),
 };
 
@@ -80,6 +85,10 @@ void pctl_ls(void) {
         continue;
       }
 
+      if (PCTL_LS_CONFIG.pid != -1 && stat.pid != PCTL_LS_CONFIG.pid) {
+        continue;
+      }
+
       string_memcpy(namebuf, stat.name, 30);
       namebuf[31] = namebuf[32] = namebuf[33] = '.';