diff --git a/Makefile.inc1 b/Makefile.inc1
index 389950cdf04..e2c967daeb9 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -1322,6 +1322,8 @@ _cat=		bin/cat
 
 .if ${BOOTSTRAPPING} < 1000033
 _lex=		usr.bin/lex
+
+${_bt}-usr.bin/lex: ${_bt}-usr.bin/m4
 .endif
 
 # r277259 crunchide: Correct 64-bit section header offset