diff --git a/src/libs/compat/freebsd_network/usb.cpp b/src/libs/compat/freebsd_network/usb.cpp
index 2b857aad0c..aa0f47f8d9 100644
--- a/src/libs/compat/freebsd_network/usb.cpp
+++ b/src/libs/compat/freebsd_network/usb.cpp
@@ -420,7 +420,7 @@ extern "C" void
 usbd_xfer_set_frame_len(struct usb_xfer* xfer,
 	usb_frcount_t frindex, usb_frlength_t len)
 {
-	KASSERT(frindex < uint32_t(xfer->nframes), ("frame index overflow"));
+	KASSERT(frindex < uint32_t(xfer->max_frame_count), ("frame index overflow"));
 	KASSERT(len <= uint32_t(xfer->max_data_length), ("length overflow"));
 
 	// Trigger buffer allocation if necessary.