diff --git a/drivers/uwb/hwa-rc.c b/drivers/uwb/hwa-rc.c
index 559f8784acf3..9052bcb4f528 100644
--- a/drivers/uwb/hwa-rc.c
+++ b/drivers/uwb/hwa-rc.c
@@ -501,7 +501,7 @@ int hwarc_filter_event_WUSB_0100(struct uwb_rc *rc, struct uwb_rceb **header,
 	int result = -ENOANO;
 	struct uwb_rceb *rceb = *header;
 	int event = le16_to_cpu(rceb->wEvent);
-	size_t event_size;
+	ssize_t event_size;
 	size_t core_size, offset;
 
 	if (rceb->bEventType != UWB_RC_CET_GENERAL)