diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index d74e7b3..8e8f4d3 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -3885,7 +3885,7 @@ build/gengenrtl.o : gengenrtl.c $(BCONFIG_H) $(SYSTEM_H) rtl.def
 # the build-%: rule doesn't apply to them.
 
 gengtype-lex.o build/gengtype-lex.o : gengtype-lex.c gengtype.h $(SYSTEM_H)
-gengtype-lex.o: $(CONFIG_H)
+gengtype-lex.o: $(CONFIG_H) $(BCONFIG_H)
 CFLAGS-gengtype-lex.o += -DGENERATOR_FILE
 build/gengtype-lex.o: $(BCONFIG_H)