diff --git a/libs/video/targets/fbset_modes_l.l b/libs/video/targets/fbset_modes_l.l
index 10fe5470c..5bb8a9122 100644
--- a/libs/video/targets/fbset_modes_l.l
+++ b/libs/video/targets/fbset_modes_l.l
@@ -23,6 +23,8 @@
 #include "fbset.h"
 #include "fbset_modes_y.h"
 
+#define YY_NO_UNPUT
+
 struct keyword {
     const char *name;
     int token;