diff --git a/core/embed/io/usb/unix/usb.c b/core/embed/io/usb/unix/usb.c
index 5bde28f6fe..d18f602417 100644
--- a/core/embed/io/usb/unix/usb.c
+++ b/core/embed/io/usb/unix/usb.c
@@ -141,6 +141,10 @@ secbool usb_vcp_add(const usb_vcp_info_t *info) {
 }
 
 static secbool usb_emulated_poll_read(uint8_t iface_num) {
+  if (usb_ifaces[iface_num].msg_len > 0) {
+    return sectrue;
+  }
+
   struct pollfd fds[] = {
       {usb_ifaces[iface_num].sock, POLLIN, 0},
   };