diff --git a/user/tb/interp.c b/user/tb/interp.c
index 8c96427..613d033 100644
--- a/user/tb/interp.c
+++ b/user/tb/interp.c
@@ -255,10 +255,11 @@ bool interp_runstring(char *string, InterpResult **res, bool interactive) {
       proc_run(app);
 
       if (wait) {
+        uint8_t key = 0;
         while(proc_pollstate(app) != 4) {
           if (interactive) {
-            int32_t key = dev_cmd(&ps2kbdev, DEV_PS2KBDEV_READCH, NULL, 0);
-            if (key > 0 && (uint8_t)key == C('S')) {
+            int32_t read = ipc_mbusconsume("ps2kb", &key);
+            if (read > 0 && key == C('S')) {
               proc_kill(app);
               goto cleanup;
             }