diff --git a/lang/cem/lint/llib/proto.make b/lang/cem/lint/llib/proto.make
index a2acfbb98..ea8b501f1 100644
--- a/lang/cem/lint/llib/proto.make
+++ b/lang/cem/lint/llib/proto.make
@@ -27,6 +27,7 @@ install:	all
 	-mkdir $(TARGET_HOME)/lib.bin/lint/llib
 	cp $(SRC_DIR)/*.llb $(TARGET_HOME)/lib.bin/lint/llib
 	cp *.llb $(TARGET_HOME)/lib.bin/lint/llib
+	chmod +w $(TARGET_HOME)/lib.bin/lint/llib/*
 
 cmp:
 	echo "nothing compared"
@@ -42,10 +43,12 @@ clean:
 
 c.llb:	$(SRC_DIR)/unix7.c
 	cp $(SRC_DIR)/c.llb c.llb
+	chmod +w c.llb
 	$(LINT) -Lc.llb $(SRC_DIR)/unix7.c
 
 ansi_c.llb:	$(SRC_DIR)/unix7.c
 	cp $(SRC_DIR)/ansi_c.llb ansi_c.llb
+	chmod +w ansi_c.llb
 	$(LINT) -ansi -Lansi_c.llb $(SRC_DIR)/unix7.c
 
 curses.llb: